Marvin J. Chomsky Director Joseph Cotten Admiral Actor Leonard Nimoy Commander Phil Kettenring Actor Lloyd Haynes Lieutenant Dave Burston Actor Dewey Martin Skip Langley Actor William Windom Captain Frank Reardon Actor Keenan Wynn Orville Kelly Actor Malachi Throne Dr. Dykers Actor Sam Elliott Ensign William "Bill" Sandover Actor Ivor Barry Donald Ellington Actor Ron Masak CPO Corky Schmidt Actor Bruce Lansbury Producer Jackson Gillis Screenwriter Leith Stevens Original Music Howard Schwartz Cinematographer Donald R. Rode Film Editing Jim Merrick Casting William L. Campbell Art Director Pierre W. Ludlam Set Decoration