When does My Name Is Earl return?

My Name Is Earl is an American television sitcom that aired on NBC from September 20, 2005, to May 14, 2009, with a total of four seasons consisting of 96 episodes. It starred Jason Lee as the title character, Earl Hickey, a small-time thief with a messed-up life. The series ends with a cliffhanger that was to be resolved in season 5.