College Professor
Dan Daubrey
Frank Parker - Tenor Singer
Minister
Engineer (uncredited)
Danny O'Day
Iceman
Hardin
Deputy Sheriff Hank Matson (as Brett Parker)
Technician #2
Bill
Jerry Wade
Captain
Lane Curran
Tom Brown
Clifford
Vic Hancock
Hans - Officer #2 (uncredited)
Ed
Commander
Guard Russell
Father Jeremy Hogan
Countdown Technician
Zed