The Unusual Suspects
Alphas Season 1 Episode 10 (09/19/11)
Clay captures the Alphas because he believes someone in the group is a mole.
Dr. Rosen successfully leads them out of a jailbreak from Bigington.
While on the run, Dr. Rosen believes Cameron is the mole and takes Gary while Bill fights Cameron.
The real Rosen wakes up in a room somewhere and is about to be killed while Rachel deduces Rosen is an imposter.
The Alphas are able to capture the shape shifting Alpha.