Two BIG twists toward the end of the January 8 episode, and both came as complete surprises to me! (I like being surprised.) The first of the two (in sequence), while surprising was not particularly shocking under the circumstances (the show's imminent cancellation, I mean), but the second one I couldn't have foreseen, not no way, not no how!
Two episodes left!
I didn't figure out the second surprise, but it didn't surprise me, either. Well, that's not entirely true...
Can I go into semi-spoiler mode? I can? Okay!
Right, so. What makes it unsurprising is primarily the meta-knowledge we have: that there are only two episodes left to the series. So, knowing that Caroline is the only person who's seen the secret partner's face, that means that when that partner is revealed (as s/he had to be this episode), it had to be someone we already knew, because using those last two episodes to establish who a baddie is in the first place is time lost for wrapping up the heroes' story. And more to the point, it had to be one of the apparent "good guys:" if it was one of the already-established bad guys, it would make keeping the identity secret a pointless exercise. If it was a peripheral character — another doll, a Dollhouse client — it gives more value to the reveal, but still makes it more or less irrelevant to the reveal nature of the story.
So having to be a "good guy", that then eliminates anyone whose pre-Dollhouse backstory has been established: Echo, Sierra, Victor, Topher, Ballard, Dominic, November... Doesn't really leave a lot of candidates, does it?
(Personally, I think it would've been awesome if Mark Sheppard's character — the FBI agent who showed up at Ballard's early investigations-gone-bad and mocked his dedication to finding the Dollhouse — had been revealed as the Big Bad. But then, that has more to do with wanting to see Mark Sheppard again than anything that would make sense in-story...)
I'm honestly not too keen on this reveal, because with something like this, it should be seen and then responded to with an "Of course! It all makes sense in retrospect!" headslap, and I responded more with an, "....okay, I guess? But...how does it make sense with what we've seen before?" It's going to take the next two episodes to sell me on this; I'm hoping team Dollhouse can pull it off...
I'm going to hold off reading the interview Ana linked, but I completely agree with Alan and Chris's assessment of the "big reveal," BUT... what if Boyd isn't an "evil mastermind" after all, a twist within a twist. (Terminator: The Sarah Connor Chronicles pulled off a similar switcheroo in its final days.)
It's funny that this plot turn with Boyd is happening at the same time the identity of Twilight from the Buffy comics leaked... I won't say anything about that in case anyone hasn't heard, but I find myself similarly scratching my head and wanting an explanation from both reveals.
Don't you think the identity of Buffy's Twilight isn't a bit of a jab at a certain author saying, HEY I was there first, lady!?