I've seen "IaMD", and agree with teacake
that it just wasn't interesting. I've got no problem with evil-people drama - ever see HBO's Conspiracy
? It's two hours of various top-level Nazis slowly and subtly agreeing on the Final Solution without quite
saying so out loud - and it's utterly gripping. "IaMD" is too cartoonish and frenetically plotted to build up any of the dread that such a context cries out for.
That said, I think I tuned in after the teaser, and thus have never seen it. Eh. I agree with those who said that the "Twilight" teaser is the series' best, though "Regeneration" and "Fusion" had pretty strong ones also.