"The Sponge Who Could Fly", also known as "The Lost Episode", is the 19th episode of the third season and the 59th overall episode of the American animated television series SpongeBob SquarePants. It was written by Walt Dohrn, Paul Tibbitt, and Merriwether Williams, with Andrew Overtoom and Tom Yasumi serving as animation director and Mark O'Hare as the director of the walk cycles in the beginning of the episode. The episode was produced in 2002 and aired on Nickelodeon in the United States on March 21, 2003.