And now for something completely controversialicious.

[Greyce]

And god, One-Eye Tigh is the most kickass XO ever. "Get back to your stations! My name is Saul Tigh, and I'm an officer in the Colonial Fleet. And if I die today, that's the man I'll be." Indeed, Saul. Indeed. B)

Customary Spoiler Alert!
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I find it interesting you chose to single that scene out as an example of Col. Tigh's devotion. I remember watching it and thinking that the best possible solution would be for him to take a stroll out of an airlock, preferably after similarly taking care of the other 3 known sleeper Cylons. Or at the very least, write Adama a letter so he could do it for him. I mean seriously, what has he got to live for? He was already trying to drink himself to death before he found out he was a Cylon; and now he's found out he is a danger to what little he values in his life - his ship and Bill Adama. Hell, he killed his own wife to prevent damage to the human cause; and if we are to believe what we see about his feelings for her, killing himself would have been much easier. And he presents a much greater danger.

Between seasons 3 and 4 I've been pondering the storyline implications of the four revealed Cylons, and I'm genuinely interested in Anders and Tyrol. Tyrol and Anders have love interests and/or family to keep them grounded in their human lives (Tori is an underdeveloped character brought into the series to replace Billy - the actor who played him backed out of filming commitments and thus was written out of the series). Their identity struggles are going to play out well in season 4 (likely in mimic of Boomer's struggles throughout season 1, which is somewhat ironic in the case of Tyrol). But Tigh? Every time I think about that character's predicament I wonder why he hasn't yet spaced himself.

Of course there could be a practical explanation (compromising his cover identity could snap his Cylon personality on, like Baltar's Six suggested about Boomer when she was being tested back in Season 1).

Obviously though, the real reason he hasn't killed himself is because this way makes for much better television!