CBS

Season 5: Episode 18 - The Werewolf Transformation

The Werewolf Transformation: ­Sheldon's routine world is turned upside down when he learns that his longtime barber passed away, so he tries to act like a hippy to match his new shaggy hairstyle. Meanwhile, Wolowitz is sent to Houston for the grueling NASA training program, and he shares his horrific stories with Bernadette via Skype.