Cast:Kenneth Tobey (Pete Mathews)
Faith Domergue (Lesley Joyce)
Donald Curtis (Prof. John Carter)
Ian Keith (Admiral Burns)
Dean Maddox Jr. (Admiral Norman)
Chuck Griffiths (Griff)
Harry Lauter (Deputy Bill Nash)
Richard W. Peterson (Captain Stacy)
Del Courtney (Asst. Secy. Robert David Chase)
Tol Avery (Navy Intern)
Ray Storey (Reporter)
Rudy Puteska (Hall)
Jack Littlefield (Aston)
Ed Fisher (McLeod)
Jules Irving (King)

Crew:Producer: Charles H. Schneer
Director: Robert Gordon
Screenplay: George Worthington Yates, Hal Smith
(Story by George Worthington Yates)
Technical Effects: Ray Harryhausen
Art Director: Paul Palmentola
Director Of Photography: Henry Freulich
Film Editor: Jerome Thoms
Sound: Josh Westmoreland
Musical Score: Mischa Bakaleinikoff
Assistant Director: Leonard Katzman
Special Effects: Jack Erickson
Set Decorator: Sidney Clifford
Executive Producer: Sam Katzman
Unit Manager: Leon Chooluck.