One Small Step: The Story of the Space Chimps is a 2008 documentary film produced and directed by David Cassidy and Kristin Davy which aired on History Channel UK and CBC Television. The film chronicles the real story behind the early use of chimpanzees in space exploration. The film was released on DVD in April 2008, after several delays. David Cassidy is best known for producing the documentary Shut Up and Sing on the Dixie Chicks, and the Disney Channel show High School Musical: The Music in You.
Told through archival photos and footage, space historians, testimony from the chimps trainers, and through the people who fought for the space chimps peaceful retirement, the film explores the compelling journey of the United States Air Force space from their primate predecessors and early rocket tests to Ham and Enos as they made their ground breaking missions into space.