Harlequin

Robert Powell

— Gregory Wolfe

David Hemmings

— Nick Rast

Carmen Duncan

— Sandra Rast

Broderick Crawford

— Doc Wheelan

Gus Mercurio

— Mr. Bergier

Alan Cassell

— Mr. Porter

Mark Spain

— Alex Rast

Alyson Best

— Alice

Sean Myers

— Benny Lucas

Mary Simpson

— Zoe Cayce

Neville Teede

— Dr. Barthelemy

Anne-Marie Mackay

— Miss Edith Twist

John Frawley

— Dr. Lovelock

Nita Pannell

— Mabel Wheelan

David Hough

— Mr. Jepson

Klaus Schultz

— Arthur

Peter West

— Godfrey

Maurie Ogden

— Prison Officer

Jack Ferrari

— Eli Steele

Jeremy Sims

— Young Boy on Raft

Toby Amoore

— Young Boy on Raft

Sebastian Hunsley

— Young Boy on Raft

Julia Moody

— Reporter

Leslie Wright

— Mayor

Adele Cohen

— Mayoress

Ramsay McLean

— Broadcaster

John Brownbridge

— Police Officer with Binoculars (uncredited)

Nicole Dehring

— Party Hostess (uncredited)

Bevan Lee

— Mr. Robinson