The Werewolf Transformation

 The Werewolf Transformation is the eighteenth episode of the fifth season of the CBS sitcom The Big Bang Theory. It is set to air on February 23, 2012.

Summary
Sheldon's life is turned upside-down after his barber gets sick. Meanwhile, astronaut training gets Howard to rethink about his decision to join NASA's upcoming spring mission to space.

Reference

 * Press release by CBS