Michael Ray Bower guest stars as geeky transgenic teenager Brain, who tirelessly monitors (and apparently anticipates) all movements of S1W. Smitten by Max (Jessica Alba), Brain agrees to help uncover the spy within the S1W ranks who turned Asha (Ashley Scott) over to the authorities. Meanwhile, Alec (Jensen Ackles) comes closer to figuring out which side Max is truly working for. ~ Hal Erickson, Rovi