Robert Hays
D.H. 'Hank' Mercer / Biff Deegan
Catherine Mary Stewart
Marissa
Christopher Murney
Lt. Greenberg
Fred Gwynne
Victor Greville
Celeste Holm
Claire
Martin Neufeld
Pete
Michael Copeman
Eric Keenleyside
Robin Ward
Louis Di Bianco
Marc Gomes
Lynne Cormack
Lynne Gorman
Jacques Sandulescu
Timothy (uncredited)
Lewis J. Stadlen
Norman Wagstaff (uncredited)
Jonathan Moore
Nicholas Rubinstein
Bunty Webb
Eric Fink
Thick Wilson
Al Bernardo
Raymond Hunt
James Walton
Robbi Baker
Alan Rose
Tony (uncredited)
Gavin Steed
Roger Delacroix (uncredited)