Robert Beatty as Pete Dawson

Lee Patterson as Colin Walker

Betty McDowall as Lucille Walker

Vincent Winter as The Boy

Robert Ayres as Insp. Andrews

Alan Gifford as George Foster

Larry Cross as Reporter

Sandra Francis as Evelyn Webb

Gordon Tanner as Dr. Hewitson

Victor Wood as Howard Zeeder

Peter Mannering as Dr. Foy

Roland Brand as Police officer

Sean Connery as Welder #1

Murray Kash as Welder #2

Jack Cunningham as Max Jarvis

David Williams as Police Officer