Chuck is in luck. Intersect II is ready for espionage service. But if Chuck goes back to his old life, Casey has orders to off him. Chuck survives to unravel mysteries of the past, become a hero in the present, and there's a stunner of a season finale.

It's a whole new year for the staff at Sacred Heart. Elliot undergoes a complete makeover in an attempt to change her luck, and the residents discover the incredible healing powers of an epiphany toilet. Join J.D. and his fellow interns as they face more medical and comical dilemmas.