John Bentley

Superintendent Wills

Patrick Allen

Dr. Nelson Pollard

Jacqueline Ellis

Elsa Marlowe

Wilfrid Brambell

Lock-Keeper

John Glyn-Jones

Dr. Maurice Tarn

Jane Murdoch

Honeymoon Wife

Brian McDermott

Det. Sgt. Stillman

Gerald Andersen

Major Paul Amery

Edward Atienza

Clerk

Ric Young

Johnny Choto

Robert Lee

Mr. Nam Lee

Yvonne Buckingham

Miss Russell

William Gaunt

Mitch Hallam

Michael Deacon

Angus

Arnold Lee

Soyoki

John Horsley

Pathologist

Lesley Nunnerley

Vera Martin

Malcolm Russell

Joe Martin

Yvonne Shima

Tamaya

Keith Faulkner

Lock-keeper's Assistant

Myo Toon

1st Chinese Man

Sano Wong

2nd Chinese Man

Burt Kwouk

Captain Feng

Timothy Parkes

Honeymoon Husband

Howard Pays

Police Sgt.

Peter Hager

Warden

Don McKillop

Reporter

Robert Russell

Uniformed Sgt.

Steve Reagan

Police Constable

Ping Ping Sam

Instructor in Gym