"The Stand-In" Season 5, Episode 16

Kramer convinces his little friend, Mickey, to "heighten" so they can both keep their jobs standing in on a soap opera. Jerry feels pressure to deliver when he is asked to perform in the hospital for a sick friend. George stays with his current girlfriend only to prove that he's not going to hurt her. Elaine goes out with Jerry's friend, but it doesn't end well when he takes "it" out.