Robert Beatty
— Pete Dawson
Lee Patterson
— Colin Walker
Betty McDowall
— Lucille Walker
Vincent Winter
— The Boy
Robert Ayres
— Insp. Andrews
Alan Gifford
— George Foster
Larry Cross
— Reporter
Sandra Francis
— Evelyn Webb
Gordon Tanner
— Dr. Hewitson
Victor Wood
— Howard Zeeder
Peter Mannering
— Dr. Foy
Roland Brand
— Police officer
Sean Connery
— Welder #1
Murray Kash
— Welder #2
Jack Cunningham
— Max Jarvis
David Williams
— Police Officer