Cast

• Peter Graves Jeff Knight
• Rick DiAngelo Guide #1
• Eugene Robert Glazer Guide #2 (as Gene Glazer)
• Eileen Dietz Dana
• Paulette Breen Lena
• Tim Donnelly Richard Knight Jr. (as Timothy Donnelly)
• Frank Ashmore George Walker
• Keith Langsdale Guide #3
• Dick Sargent Dr. Jameson
• Zale Kessler Dr. Nelson
• Larry Manning Guide #4
• William Bufkin Clone
• Tony Haig Jack
• Boyd Holister Senator
• Eddie Carroll Doctor (as Eddy Carroll)
• John Donovan Guide #5
• Greg Brickman Motorcycle Rider
• Keenan Wynn Jake Noble
• Lurene Tuttle Anna Noble
• James Mantell Ricky Knight
• David Hooks Richard Knight
• Joel Lawrence Guide #6
• George P. Wilbur Walker Man (as George Wilbur)
• Chuck Hayward Walker Man
• Amanda Davies Reporter Grady
• Frank Birney Reporter Birney
• Robert S. Fiveson Security Guard (uncredited)

Writers

• Ron Smith
• Bob Sullivan
• Bob Sullivan
• Myrl A. Schreibman
• Robert S. Fiveson

Producers

• Peter R.J. Deyell
• Ray Dryden
• Robert S. Fiveson
• Walter Fiveson
• Michael D. Lee
• Myrl A. Schreibman
• Mark L. Rosen