Synopsis
A British agent's son is kidnapped and held for a ransom of diamonds. The agent finds out that he can't even count on the people he thought were on his side to help him, so he decides to track down the kidnappers himself.
Cast

Michael Caine
Maj. John Tarrant

Donald Pleasence
Cedric Harper

Delphine Seyrig
Ceil Burrows

Clive Revill
Alf Chestermann

John Vernon
McKee

Joss Ackland
Chief Supt. Wray

Janet Suzman
Alex Tarrant

Catherine Schell
Lady Melissa Julyan

Joseph O'Conor
Sir Edward Julyan

Denis Quilley
Bateson

Derek Newark
Monitoring Policeman

Edward Hardwicke
Mike McCarthy
Maureen Pryor
Jane Harper

Joyce Carey
Miss Monley
Preston Lockwood
Ilkeston
Molly Urquhart
Margaret

David Daker
MI5 Man

Hermione Baddeley
Hetty

Patrick Barr
Gen. St. John

Yves Afonso
Jacques (uncredited)
Del Baker
Shadow (uncredited)
Murray Brown
Doctor (uncredited)
Les Conrad
M15 Man (uncredited)
George Lane Cooper
Pincus (uncredited)
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