John Saxon

Character: Dr. Jack Costain

Patricia Haines

Character: Ann Barlow

Alfred Burke

Character: Detective Supt. Hartley

Maurice Denham

Character: Dr. Morley

John Carson

Character: The Major

Ballard Berkeley

Character: Cmdr. Savage

Stanley Meadows

Character: Det. Tom Grant

Barbara French

Character: Joyce Malone

Robert Crewdson

Character: Medra

Aubrey Morris

Character: Thorburn

Jack Watson

Character: The Sergeant

Tony Wager

Character: Pvt. Higgins

David Gregory

Character: Pvt. Jones

Marianne Stone

Character: Madge Lilburn

Warren Mitchell

Character: Reg Lilburn

Geoffrey Lumsden

Character: Col. Davy

Douglas Livingstone

Character: 2nd R / T soldier

Tom Gill

Character: Police Commissioner's secretary

Vincent Harding

Character: First R/T Soldier

Romo Garrara

Character: Lieutenant

John Sherlock

Character: TV Newscaster