D.H. 'Hank' Mercer / Biff Deegan

Robert Hays

Marissa

Catherine Mary Stewart

Catherine Stewart

Victor Greville

Fred Gwynne

Lt. Greenberg

Christopher Murney

Michael Copeman

Claire

Celeste Holm

Lynne Cormack

Nicholas Rubinstein

Jonathan Moore

Louis Di Bianco

Eric Fink

Pete

Martin Neufeld

Lynne Gorman

Bunty Webb

Eric Keenleyside

Robin Ward

Thick Wilson

Timothy (uncredited)

Jacques Sandulescu

Al Bernardo

Norman Wagstaff (uncredited)

Lewis J. Stadlen

Marc Gomes

Raymond Hunt

James Walton

Robbi Baker

Tony (uncredited)

Alan Rose

Roger Delacroix (uncredited)

Gavin Steed