Glenn Corbett
Neil Stryker
Acting
Cameron Mitchell
George Benedict
Acting
Sharon Acker
Dr. Bettina Cooke
Acting
Lew Ayres
Prof. Dylan MacAuley
Acting
George Coulouris
Max Greene
Acting
Dean Jagger
Carl Webster
Acting
Steve Franken
Henry Maitland
Acting
Tim O'Connor
Dr. Revere
Acting
Jerry Douglas
Steve Perry
Acting
Arch Whiting
Mike Frome
Acting
H.M. Wynant
Eric Stoner
Acting
William Bryant
Truck Driver
Acting
Virginia Gregg
Ward E Administrator
Acting
Steven Marlo
Guard
Acting
Ben Wright
Doctor
Acting
Buck Young
Tom Nelson
Acting
William Harlow
(uncredited)
Acting