Well, now we know that Alan Tudyk is in Joss Whedon's Dollhouse, and just what character he plays. He talked to Entertainment Weekly about preparing for the role... including a depressingly buff body double. Spoilers!

Talking to Michael Ausiello, Tudyk explained how he ended up as Dollhouse's big bad, Alpha:

Joss told me about the role at a social function. I was asking about his new show and he started describing the role of Alpha. It sounded like the most amazing role ever, and I asked him, "Who's playing him?" He really hyped it up. And then he said, "I want you to play it." It really caught me off guard. I think it's the best role ever written. As an actor there's so much there to work with. I guess Joss always saw me as somebody who could be 43 different people at once... I've always been a raving lunatic in front of Joss. He saw that side of me the time I trashed his house because I was crazy that day. [Laughs] I was really happy he saw me as that. It's quite a compliment to offer me a role like this, because it's not easy.

One of the things that isn't so easy? Bulking up for the role:

[T]hey cast a damn body double that looks like the Hulk! Joss showed me the first episode where you see Alpha from behind and I was like, "Oh my God. I've got a lot of work to do." But I have a Ned Flanders kind of body. When I'm wearing baggy clothes you wouldn't expect that I have any muscle. Just like in tonight's episode. I don't look too wildly in shape at first. It's when I put on the tight shirt that you see it.

Tudyk even hints at possible Alpha appearances beyond next week's season finale:

Joss hasn't said anything about the future of Alpha, but I could free myself up for it. That isn't contractually impossible. I could get out as much as he needs me to.

So, wait, he's not dying next week? Now I'm even more curious to see how the season finishes.

Alpha breaks his silence! [EW.com]