Time Immortal

Spoiler Warning: this entire article is pretty much one big act of musing about the direction the series is going to go in the second half of its fourth and final season, which is set to begin airing episodes on January 16th. As such, pretty much everything I’m about to write should be considered to be a potential spoiler.

You’ve been warned, good Reader. If spoilers aren’t your bag, it’s best to skip to the next article and be done with it.

As I noted previously, series creator Ron Moore has said that he is committed to telling a story from within the framework of naturalistic science fiction, which means that the show more or less conforms to the scientific realities that we, the viewers, should know and be familiar with (apart from a set of core assumptions concerning Macguffin-esque technology that is necessary to drive the plot forward).

In other words: jump drives and artificial gravity are in. Aliens, transporters, replicators, phasers, and all the rest are out.

Because the show is built around a naturalistic sci-fi framework, its purpose won’t be to tell an “origins story” — the Colonial fleet will not be the “latest new Ark,” and its people will not be the “latest new Adam and Eve.” The emergence of humanity as a product of millions of years of evolution is reasonably well-documented, and it would defy Ron Moore’s stated commitment to that naturalistic framework were he to suddenly pull back the curtain and reveal, say, William Adama and Laura Roslin, or Lee Adama and Starbuck, to be the real Adam and Eve.

If anything, I think it will be revealed that humanity initially came from Earth and that BSG is set many thousands of years in the future. I think it will be revealed that at some point, pace Firefly, humanity fled Earth and found Kobol, and that centuries or millennia later they were forced to flee Kobol as well. I’m not sure if, or how, the Lords of Kobol will play into the story as the season progresses, and whether or not any revelations will be made about who, exactly, these beings were (if indeed they existed).

The arrival at Earth, then, will not be a discovery so much as it will be a return.

In the main, looking again at the above-linked reflection some months after having written it, and especially in light of the last episode of BSG that aired (in which what was apparently Earth was discovered), it seems that my basic assumptions were correct. What’s been interesting to observe, as the series has progressed, is that as the Colonial fleet has drawn steadily closer to Earth and discovered artifacts of either their ancestors or the Thirteenth Tribe, the age of those artifacts has been steadily increasing. The ruins on Kobol were about 2,000 years old. The beacon found in the nebula was about 3,000 years old. The Temple of Five, on the algae planet, was about 4,000 years old.

This suggests one of two things: it could, on one hand, be taken as tacit confirmation of the fact that humans originated on Earth, and subsequently took to the stars…or it could be confirmation of the fact that the Thirteenth Tribe left Kobol well in advance of the other tribes, went to Earth, and then voyaged back to Kobol at some later point in time.

This latter theory would, at least, explain why the Pythian scrolls that are so often quoted in the series would seem to chronicle a journey to Earth. At the same time, this theory is contradicted by the fact that in at least one episode, it is suggested that all thirteen tribes departed Kobol at roughly the same time. On the other hand, it is supported by the observation that the Zodiac signs that represent (and give name to) the Twelve Colonies are all constellations which are visible from Earth. Then again, that could just as easily be indicative of the fact that humanity originated on Earth, and that even though Earth itself became myth as the centuries rolled on, aspects of that history were nevertheless preserved.

I find, more and more, that I’m tending toward the theory that the Pythian prophecy speaks of a cyclical history that has now fulfilled its event arc three times: human habitation of Earth ended in catastrophe, so humanity fled to Kobol. That colonization in turn ended in catastrophe, so humanity fled in turn to the Twelve Colonies. Now those colonies have ended in catastrophe, and humanity has once again fled to the stars. But rather than flee to someplace new, they are fleeing to someplace old: Earth, much as the Thirteenth Tribe fled to Earth after the Exodus from Kobol.

And I think — still think, really — that BSG is shaping up to be an “eschatological myth” for our times. It’s not a story about humanity’s beginning, but about humanity’s end. The cyclical nature of history has been a recurring theme in the show; I think, before the end of the show, the cycle will be broken, and history “as it is known” will come to an end — and then, quite possibly a fiery, sudden end. The show is not so much a re-working of the Book of Genesis as it is a re-working of the Book of Revelation.

To my thinking, this theory was given strong support indeed by the last episode to air, Revelations, which dealt with the theme of breaking out of history’s brutal cycle. But now the question becomes: if history is indeed cyclical, within the framework of the show, then what does breaking the cycle mean? Does it perhaps signal the end of history.

Consider, for example, Edward James Olmos comments concerning the end of the series:

Edward James Olmos has said that audiences will not be prepared for the upcoming finale of Battlestar Galactica, in a panel at London’s MCM Expo and an exclusive interview with SciFiNow.

“It’s not a happy ending, we end up with almost nothing,” the 61-year-old actor told journalists from the magazine over the weekend,

Meanwhile, rumours swirl that the show’s finalé will feature a full-scale conflict and “gigantic, never before seen effects.” Coupled with Jamie Bamber’s revelation that the last scenes he shot for the series invovled Lee Adama “running around ’shooting at stuff’ with extras,” this suggests that massive battles and destruction may be the order of the day for the closing moments of the show. Numerous other hints of just such a battle have also emerged.

The series finalé seems to be shaping up to also incorporate a number of flashback-type sequences. In particular, several scenes featuring Laura Roslin were shot at Simon Fraser University’s Academic Quadrangle, which was used as the backdrop for the “Riverwalk” district in Caprica City earlier on in the series.

And then there’s Tahmoh Penikett’s statement to consider:

Everybody dies. We have a dark ending…Obviously you know, those last couple of episodes, they’re going to blow your mind. They are going to go down in history as the best television ever done.

Flashbacks, dark endings, and people left with almost nothing…yet at the same time, a satisfying, organic ending which signs everything off really well? That sort of mixture of hardship and hope is the same sort that would seem to accompany eschatological tales of virtually every sort, including (and perhaps especially) Christian eschatology. Great suffering, followed by hope and the promise of a future beyond all imagining, a future beyond the brutal confines of history and sin.

Update: One potential wrinkle in all of this could be if Ron Moore takes the story in a different cyclical direction, escaping humans and Cylons from their cycle of violence and exodus only to reveal that they represent a kind of evolutionary cycle in terms of species development. There are scattered rumours emerging that Cylon remains will be found on Earth, suggesting that the extant humans of the BSG universe are, in fact, descendants of the Cylons that the original people of Earth, or possibly Kobol, developed.

This would also tie in to the plot threads surrounding Cylon reproduction that have swirled through the show’s four seasons.

Since the following no longer contains spoilers — at least as far as Grace is concerned, which is all I was really worried about — I am moving it up to today, so that I can officially say that I’m putting my chips into the pot as far as “final Cylon” speculation is concerned********.

I’ve been kicking around the idea that one of the Adamas — the admiral, Lee, or possibly even Zak (the dead brother) — is the final Cylon. I tend to agree with the analysis at Battlestar Wiki that the final member of the twelve Humanoid Cylons “would probably need to be a more prominent character than those of the Four.” In the Wiki’s analysis, that pretty much limits the field to Roslin, Admiral Adama, Lee, Baltar, and Starbuck.

Of course, I also happen to think that revealing some of the above as being Cylons would also be…anticlimactic, and in some cases just dumb. Take Roslin for example, and the way that Baltar is able to temporarily cure her cancer. It would seem to me that if the introduction of Cylon (or, to be completely specific, humano-Cylon) blood was enough to cure Roslin (albeit briefly), that pretty much cements the fact that she herself does not have anything Cylon about her physiology.

Likewise, revealing Baltar as a Cylon would, given the events in the middle of Season 3 (i.e. Baltar’s own uncertainty as to whether he is human or Cylon, and his desperate quest for answers in this regard), would be a let-down — really, it would seem contrived.

To be fair, I can see the merit of the argument that Baltar could be revealed as a sort of Cylon “Christ”, especially in regard to the prophecy of the First Hybrid in Razor:

The First Hybrid who says his children believe he is a god, makes a prediction about the final Cylon: “…the fifth is still is in shadow, drawn toward the light, hungering for redemption, that will only come in the howl of terrible suffering.” (Razor) This statement, while not concrete, may relate to Baltar. Of the major living characters, he most has begged for redemption, and is most in need of it, and it will indeed be painful for him. While Lee Adama seeks redemption for the Olympic Carrier this has been at best a minor theme in his character. Only Baltar begs for it, and only Baltar has said he would find redemption in learning he was a Cylon.

But equally, I just don’t think it’s Baltar. He strikes me more as a sort of “false prophet,” really — a misguided human demagogue who attempts to take on the mantle of an authority figure (first as a scientist, then as a politician, and now as a quasi-religious guru) in order to advance his own agenda (which, experience shows, typically involves the contents of his pants). I don’t think it’s a coincidence that Baltar’s “saviours” in the last episode of Season 3 were all beautiful women.

And let’s not even begin to discuss Starbuck. Yes, I know she died (or seemed to die) in Maelstrom. Yes, I know she came back in the last episode of the Season 3. Yes, I know she has a destiny. No, I still don’t think she’s a Cylon.

There’s also a logistical consideration that gets in the way of Starbuck’s being a Cylon. One of the things we know about the Final Five is that none of the other seven humanoid Cylons have any clue who the Final Five are. If Kara Thrace was really a Cylon, resurrected and sent back to the Colonials in a captured (and then nicely shined-up) Viper, it stands to reason that when she appeared to Lee, she must have come from one of the nearby Cylon ships (Vipers, as far as we know, do not have FTL jump drives), possibly a Resurrection Ship. It seems pretty incredible to suggest that the Cylons could have built a shipboard resurrection apparatus that included copies of the bodies of at least one of the Final Five and still remained “in the dark” about who the Five were. The only possible dodge that Ron Moore could use here, I think, is to say that the Colonials have somehow gotten very close to the Cylon homeworld, but I don’t think he’s going to go there.

And then there’s the fact that it would just be too bloody obvious if Starbuck were a Cylon. Her “resurrection” is significant, but it’s also a red herring as far as speculating who the final Cylon might be is concerned. Starbuck’s death was a rite of purification that she had to pass through before she could take on the task her destiny had appointed for her (ostensibly, to guide the Colonials to Earth, or possibly to their extinction).

And really, I think I’m even going to add at least two of the Adamas to that list as well. I know that Leoben said that “Adama is a Cylon”, but that was well before the writers had decided on who the final Cylon was (and, indeed, well before the search for the Final Five became a significant component of the show’s plot). I think it would be somewhat dramatically compelling if Admiral Adama did turn out to be a Cylon, but at the same time it would also be contrived given both his experiences during the First Cylon War and given the fact that his closest buddy from the war, Saul Tigh, has already been “outed.”

Lee being revealed as being a Cylon would be a bit more dramatic, and certainly would seem to meet two important criteria of the First Hybrid’s prophecy concerning the last Cylon (Lee has a ton of regrets and stabs of guilt — “hungering for redemption” — and has recently set himself on a course that utterly defies everything his father stands for — “still in shadow, drawn toward the light”). Then again, though, more than a few people seem to be guessing that Lee is a shoe-in for the final Cylon, and Ron Moore is (I think) too crafty to let folks off the hook that easily. Additionally, it would be tricky to explain how exactly Lee could be a Cylon, given that the Adama family has a pretty well-known history. Suggesting that perhaps the real baby Lee was switched at birth with a Cylon infant would be one possible explanation…but that raises more questions than it answers. Who carried out the switch? Was it a human or a Cylon? If it was a Cylon, how do the other Cylons not know about (at least) this one member of the Final Five? If it wasn’t a Cylon, what motive did that person have?

Too complicated, kind of contrived, and not the sort of road one wants to wander when one only has one season of episodes left to produce; the final season is a time for tying up loose threads, not picking new ones free of the fabric.

And of course, it would be remiss to not mention the fact that Ron Moore himself doesn’t want to reveal Admiral Adama, Lee Adama, or Laura Roslin as being the final Cylon.

Revealing Zak Adama as a Cylon would certainly be compelling, although I think Zak might be too obscure a character; everyone who knows the series knows that Admiral Adama had a son named Zak, and that said son died, but I doubt many BSG fans would know Zak on sight. The character that is the final Cylon needs to be someone who is instantly recognizable. Even having William Adama exclaim “Zak!” is too much time to waste during the revelation scene — the audience has to know instantly who it is.

Besides, how would Zak even get to the Colonial Fleet in the first place? He’d either have to be waiting for them on Earth (which prompts the question: how?) or he’d have to be on a Cylon basestar, awaiting his moment in the Sun (so to speak). The same logistical objection I have to Starbuck’s being a Cylon I can now raise here as well.

So there’s my lengthy explanation of who I don’t think will be the final Cylon, and especially where Zak Adama is concerned it’s as much a repudiation of my own prior theories as it is a rejection of any of the current theories that are out there. Who then, the Reader may yet be wondering, do I think the final Cylon actually is?

Remember what I said above, how the final Cylon would have to be someone at once instantly recognizable, and also someone whose revelation as a Cylon would be even more dramatic than learning that Chief Tyrol or Saul Tigh were Cylons? There’s only one person I can think of whose revelation would be that dramatic. Briefly, I think it’s Karl “Helo” Agathon. Yes: Helo. The same Helo who fathered a child with Sharon “Athena” Agathon.

And in fact, a goodly number of my reasons for thinking this center around little baby Hera, supposedly special as a humano-Cylon hybrid. If in fact her partly human, partly Cylon parentage makes Hera unique and pivotal to the plot of the series, then the revelation that Nicholas Tyrol is also a hybrid strips that away from her, which seems anti-climactic to me. It doesn’t really make all that much sense to build up Hera’s significance for the better part of an entire season, only to discard it second-hand with the revelation that she isn’t the only one with a Cylon for a parent after all.

Hera is special. But evidently, being a half-human, half-Cylon child is not so special anymore. So why is Hera special? Could she be a child of a Cylon/Cylon union?

“But wait!” the Reader may now be about to exclaim. “Cylons cannot reproduce with Cylons!” In my defence, I would like to point out that we don’t exactly know that Cylons can’t reproduce with each other. All we know is that Cylon experimentation in this area has thus far been fruitless. But fruitless doesn’t necessarily mean impossible.

In the analysis for “The Farm”, the writers at Battlestar Wiki note the following:

• Love serves as a theme in this episode. First, we find out how important love is for the Cylons: it is considered essential for Cylon procreation. In the first episode, Number Six asked Dr. Baltar several times if he loved her. Number Six also said that “God is love”. That was after she tried to conceive from him. Love is also the reason Sharon aids Helo and the reason Helo accepts her help. Also we hear that Starbuck was abused as a child. In the last episode she said that everyone seems to fight to get their old life back and she fights because it’s all she knows how to do. In this episode she seems to develop affections to Anders. Will Starbuck find ‘reason’ in love? Commander Adama tells his subordinates that he loves them. He asks Chief Tyrol if one could love a machine. Ultimately, Commander Adama weeps over Galactica-Sharon’s body because he loved her
• Number Six mentioned that “procreation is one of God’s commandments” in the first episode, “33″. This could mean that the Cylons are trying to procreate out of a feeling that they are sinning by not being able to have children on their own

If love is such a necessary component of Cylon procreation, it stands to reason that it makes rather a lot of sense why the “in the lab” results of procreation experiments amongst the Cylons all came up negative. When one is reduced to taking a clinical approach to such things, or when one acts out of fear that by not acting one is committing a sin, one’s actions are not motivated by love. Guilt? Yes, probably. Inquiry and curiosity? Most assuredly. But love? No, probably not.

Now, we know based on the events of the first season surrounding baby Hera’s conception that the “love” necessary in a sexual union does not have to be bi-directional. The Reader may recall that while Helo very genuinely loved Sharon Valeri, the Sharon that he impregnated was (at the time) working for the Cylons and was, we can assume, very likely acting not out of love, but out of a Cylon scheme. Is it possible that Helo, ignorant of his Cylon nature and ignorant of the difficulties of Cylon/Cylon procreation surrounding the issue of genuine love, acted out of genuine love and was able to impregnate Sharon?

“But wait!” the Reader may now be about to exclaim. “What about the odd fetal blood work? Doesn’t that cement the fact that Hera is part human and part Cylon?” And I will grant that it is true that Hera’s blood, as discovered by Dr. Cottle and Dr. Baltar during the debate over whether or not Sharon’s pregnancy should be forcibly terminated, has some unique properties. But it’s those very unique properties that make me doubt that she is in fact a half-human, half-Cylon child.

Baltar explained fairly plainly that human blood contains antigens, and that Hera’s blood contains no antigens at all. We can perhaps infer that she got this from her Cylon mother…but then, that doesn’t make sense, because one would think that Baltar’s Cylon detector would have been a lot less complicated if all Cylons had antigen-free blood. Moreover, wouldn’t Dr. Cottle have noticed something “damn odd” about Sharon’s blood work? And wouldn’t an injection of Sharon’s own blood have been sufficient to cure Roslin’s cancer in that case? I think we can safely conclude that Sharon’s blood is not as easily distinguished from human blood as in the example Baltar draws for Admiral Adama.

There is something special about Hera’s blood that her parents lacked. But how can that be? If neither her father nor her mother had antigen-free (or “damned odd,” to use Cottle’s term for it) blood, where did she get it from? What if the unique structure of Hera’s blood is analogous to, say, the way that Frank Herbert’s Bene Gesserit breeding program and the ultimate goal of the Kwisatz Haderach? What if, because of the union of two Cylons and the emergence of a pregnancy from that, a special category of being was created that did have truly antigen-free blood (among other differences)? What if that’s the real reason that the Cylons were attempting to breed? What if that’s the real reason Virtual Six, the image of Six that Baltar keeps seeing, called the child a “miracle from God?”

THe above becomes especially important when one considers, again, the presence of Nicholas Tyrol, the Chief’s son. It stands to reason that if Nicholas was the same manner of being as Hera (that is, half-human and half-Cylon) that his blood would have similar properties; Dr. Cottle was on New Caprica during the time that Cally was pregnant, and would almost certainly have given the pregnant woman a good standard of care, including fetal blood work. Failing that, he would have likely done as much once Nicholas was born, and realized either way that baby Nicholas also had something “damned odd” about his blood. That, in turn, would have cast suspicion on either Chief Tyrol or Cally as being possible Cylons. And yet, none of these plot threads came up in the third season of BSG.

That would seem to suggest, to me at least, that humano-Cylon children are not really all that special, nor does it suggest to me that there is anything particularly unique about their physiology. And I think don’t think Ron Moore overlooked, by accident, the fact that Tyrol’s being outed as a Cylon would have undercut Hera’s significance if she were in fact a human/Cylon hybrid. I think that Nicholas Tyrol is a vehicle for a subtle clue that Moore is giving to the audience: Hera is significant, but half-human, half-Cylon children aren’t.

And the only way I can think that he can make Hera significant is if she is neither a human child nor a humano-Cylon child; she can only be significant if she is the offspring of two Cylons: Sharon and Helo.

Which could explain Number Three’s surprised exclamation when she meets the Final Five and looks upon the face of one of them: “You… forgive me… I had no idea.” That’s not merely an excited outburst caused by having seen one of five forbidden faces — that’s genuine surprise at something she didn’t think was possible. We know that, as , the Threes came face to face with Helo once before. Could Helo have been the face that she saw?

At this point, we should ask what the nature of the Humanoid Cylons is, and what Ron Moore’s intent as a writer was when he created that plot idea:

The idea was that these models of Cylon were sort of developed out of their own study of us. The Cylons on some level looked at humanity and said ‘You know what? There’s really only twelve of you.’ If these are the twelve, and sort of if you look at them they each represent different archetypes of what humanity is.”

So what traits have we seen manifest in the Cylons presently known, and what trait(s) are still missing?

• In the Threes, we see a calculating duplicitousness, a manipulative behaviour that sees even fellow Cylons as tools to be used. There is also a religious streak to the Threes that draws its inspiration from experiences of the divine
• In the Fives (the Aaron Doral model), we militant fanaticism, and a willingness to resort to anything, from deliberately sowing confusion to outright suicide bombing, “for the cause.”
• In the Sixes, we see two almost competing ideas. On one hand, this model seems to rely very heavily on sex and seduction to advance its goals, but on the other hand it is very intensely religious about them, and a real focus on the concept of revelation and personal communication with God’s will
• In the Eights we see the soldier and spy, the sabotage expert and the “field operative.” These models are also regarded as defective for their ability to love selflessly. All business, these ones…but with one key weak spot. She’s the woman who could have everything and be anything…and who would let it all go for love
• In Simon, we see an intellectual and possibly a scholar
• In Leoben, we see the mystic and the prophet, and also the model most obsessed with the idea of procreation. At Batttlestar Wiki, he is likened to the serpent in Genesis, tempting with knowledge and half-truths and then sitting back and enjoying the show as the chaos that comes with having that knowledge takes its toll on humanity
• In Cavil, we have the single-minded, sardonic, atheistic “strongman.”
• In Tigh, we have the flawed man, the hard drinker and the coward
• In Tyrol, we have the “everyman” — proud but competent, agnostic but also inexorably tethered to the faith of his past
• In Anders, we have the jock, but underneath that exterior there’s a man who both hates what fates have befallen him and a man who realizes when a job needs to be done, and who jumps at the chance to do it
• And in Tory Foster, we have the consummate career girl; all business, but coming apart at the seams and not above a little casual hookup. At the same time, she too is willing to cheat and manipulate, cajole and barter, in order to achieve her goals

When I look at that list (and yes, some of it is just speculation on my part), what I notice as being missing is someone who is genuinely humble, the “good man” who tries, at every turn, to do the right thing. Helo’s sense of right and wrong is second to none in the series, even if his standing up for what is right poses, to him,, a genuine risk.

To enumerate just briefly:

• He gives up his seat so that Baltar can escape the colonies
• He goes out of his way to make Sharon feel at ease when they find the bomb shelter in the café
• He can’t bring himself to abandon Sharon after it appears that she has been captured by the Cylons
• He refuses to let Starbuck kill Sharon when the former returns to Caprica to retrieve the Arrow of Apollo. He later defends Sharon from Lee Adama and President Roslin as well
• During the trek to the Tomb of Athena, Helo cares for Sharon and is obviously in love with her. When she asks for his trust, he gives it, despite his reservations
• When the crew of Galactica ostracizes him, Helo keeps to himself quietly, sharing his time only with Starbuck and spending every free moment visiting Sharon in the ship’s brig. He nevertheless does not give up hope, even going so far as to suggest the use of carbon composite for the hull of the stealth ship that Chief Tyrol’s deck crew builds
• He rushes to intervene when Sharon is attacked and nearly raped
• When Roslin and Dr. Cottle stage their duplicitous exchange of Hera for a dead baby, Helo stands by his wife and attempts to console her, despite the obvious grief he himself feels
• He steps into the XO’s role when Adama has to send Tigh away
• When Adama and Roslin decide to attack the Cylons with biological warfare, Helo intervenes and kills (by sabotaging the atmospheric system in the brig) Cylons infected with a virus that is deadly to them
• He is Adama’s “voice in the wilderness” when another doctor begins to exterminate Sagittaron patients
• He senses that “a storm is coming” just as the Fleet is about to jump to the Ionian Nebula

There’s a lot there, but the general picture it paints is of a man who tries his level best to be selfless and humble, caring and giving — all traits that are, more or less, missing from the current crop of features evident in known Cylon models. If we can take Ron Moore at his word that each Cylon acts out a human archetype, Helo becomes an even better prospect for being the final Cylon, because he is perhaps the most unique character in the series for how he constantly strives for what is righteous and true.

Now, what do we know about the final Cylon? Most of our clues come from the utterances of the First Hybrid, which read (in part) as follows:

The denial of the one true path, played out on a world not their own, will end soon enough*. Soon there will be four, glorious in awakening, struggling with the knowledge of their true selves**. The pain of revelation bringing new clarity and in the midst of confusion, he will find her***. Enemies brought together by impossible longing. Enemies now joined as one****. The way forward at once unthinkable, yet inevitable. And the fifth, still in shadow, will claw toward the light, hungering for redemption that will only come in the howl of terrible suffering. I can see them all. The seven, now six, self-described machines who believe themselves without sin*****. But in time, it is sin that will consume them. They will know enmity, bitterness, the wrenching agony of one splintering into many******. And then, they will join the promised land*******, gathered on the wings of an angel. Not an end, but a beginning.

The final Cylon is “hungry for redemption that will only come in the howl of terrible suffering.” Now, we’ve discussed some of what Helo has done that is righteous, and that he has always tried to do what is right. Like every human being, he has failed on some accounts. Here’s a short list.

• He has to gun down a civilian in order for Sharon’s Raptor to be able to take off and escape the Colonies
• He abandons, and then later shoots Sharon when he first realizes what she is
• He murders an officer. Even though the guy was about to rape Sharon, Helo is still a military man, and can appreciate the gravity of his action
• To prevent genocide, Helo has to kill several Cylons. I think Helo is righteous enough to realize that even though he prevented a greater evil, the lesser evil was still just that — evil
• He has to summon the ability to kill the mother of his child when he learns that Hera is still alive and on one of the Cylon basestars
• And really, it was only because of his actions in the first place that Baltar survived and became the menace that he did

I think this last point may be the most significant. As yet, we haven’t seen much of Helo’s reaction to what Baltar has become, but I don’t think anyone, especially Ron Moore, has forgotten Helo’s initial role in ensuring that Baltar escaped from Caprica alive. I think, in the coming season, we’re going to see Helo struggle immensely with this, torn between his desire to always do what is right (and saving Baltar was the right thing to do) and his regret at the destruction that has been visited upon humanity because of the choice he made. I think, especially as Baltar’s influence as a quasi-religious figure grows during the progression of the fourth season, we’ll see Helo suffer terribly for the choice he made — maybe even to the point of losing some or all of his loved ones. Sharon Agathon might not survive the fourth season, after all******.

I realize that suggesting that Helo is the final Cylon puts me in a definite minority, and I realize that I’m putting myself at risk of having any number of BSG fanatics (that is, people more fanatical than myself) swoop in with various bits of evidence that I’ve missed so as to refute the points I’ve made here. And that’s fair, if it happens; I could easily be wrong about all this. But for what it’s worth, I think that Helo is the most probable choice for the final Cylon. And I do believe that his revelation as such would be way more dramatic a thing than any of the Adamas, because it would change not only our perceptions of who Helo himself is, but of who his daughter is and why she really is so significant to the Cylons and to the Virtual Six that only Baltar can see, who claims to be an “angel of God.”