"When a corpse is found in the Thames, the only clue is that the dead man was killed by a karate or judo expert."
John Bentley
as Superintendent Wills
Patrick Allen
as Dr. Nelson Pollard
Jacqueline Ellis
as Elsa Marlowe
Wilfrid Brambell
as Lock-Keeper
John Glyn-Jones
as Dr. Maurice Tarn
Jane Murdoch
as Honeymoon Wife
Brian McDermott
as Det. Sgt. Stillman
Gerald Andersen
as Major Paul Amery
Edward Atienza
as Clerk
Ric Young
as Johnny Choto
Robert Lee
as Mr. Nam Lee
Yvonne Buckingham
as Miss Russell
William Gaunt
as Mitch Hallam
Michael Deacon
as Angus
Arnold Lee
as Soyoki
John Horsley
as Pathologist
Lesley Nunnerley
as Vera Martin
Malcolm Russell
as Joe Martin
Yvonne Shima
as Tamaya
Keith Faulkner
as Lock-keeper's Assistant
Myo Toon
as 1st Chinese Man
Sano Wong
as 2nd Chinese Man
Burt Kwouk
as Captain Feng
Timothy Parkes
as Honeymoon Husband
Howard Pays
as Police Sgt.
Peter Hager
as Warden
Don McKillop
as Reporter
Robert Russell
as Uniformed Sgt.
Steve Reagan
as Police Constable
Ping Ping Sam
as Instructor in Gym
Clive Donner
Director
Edgar Wallace
Novel
Jim O'Connolly
Associate Producer
Peter Mullins
Art Direction
Robert Banks Stewart
Writer
Bert Mason
Cinematography
Charles Blackwell
Original Music Composer
Jack Greenwood
Producer
Derek Holding
Editor
Ronnie Curtis
Casting Director
Hilda Fox
Hairdresser
Aldo Manganaro
Makeup Artist
Joe Levy
Production Manager
Bert Pearl
Assistant Director
Ronald Abbott
Sound Recordist
Michael Shah Dayan
Sound Editor
Sidney Rider
Herbert Smith
Camera Operator
Eileen Welch
Wardrobe Supervisor
