!!!!! Best. Episode. Ever. Unfortunately, I was so happy because of Alan Tudyk that I don't think I was able to fully appreciate him as Alpha. I guess I'll just have to watch it again. It wasn't completely unexpected. I had heard the rumors that he was Alpha, Alpha was being built up as a big reveal, and the possibility came to mind several times throughout the episode, but still the instant change over was awesome and made me simultaneously go "Oh, crap" and squee for joy. I recall that when the trailer for 3:10 to Yuma came out Joss momentarily thought that the evil badass gunslinger Charlie was being played by Tudyk. Then Joss realized his mistake but noted how great Tudyk would be as a raging psychopath. So glad we have the opportunity, however brief it may end up being, to see that. Ending threw me for a spin as well.