"\"The Substitute\" is the fourth television episode of the American Broadcasting Company's sixth season of the serial drama television series Lost and 107th episode overall. The episode aired on February 16, 2010, on ABC. It was directed by Tucker Gates and written by executive producer Elizabeth Sarnoff and producer Melinda Hsu Taylor."@en . . . . "4"^^ . . "The Substitute"@en . . "2010-02-16Z"^^ . . . "6"^^ . . . . .