"While investigating a murder case, a detective stumbles upon a rare-stamp swindle involving the victim's twin sister."
James Booth
as Matthews
Francesca Annis
as Delphi / Diane
Nicky Henson
as Roger
Joss Ackland
as Jones
Richard Heffer
as Claude
Sue Lloyd
as Model
Joseph O'Conor
as Blachford
Una Stubbs
as Anna
George Murcell
as Doctor Merrick
Marianne Stone
as Mrs. Parsons
Penelope Keith
as Miss. Hartridge
John Savident
as Sir Robert Hampton
Clinton Greyn
as Van Der Meij
Christian Rodska
as Clerk
Marc Zuber
as Hotel Receptionist
Anthony Naylor
as Rugby Player
John Rhys-Davies
Rodney Cardiff
as Doctor
Stephanie Smith
as Delphi / Diane as child
Peter Salmon
as Male Model
Michael Buchan
Clifford Earl
as CID Man
Eric Kent
Josie Grant
as Barmaid
Guy Standeven
as Man in Street
Jack Cardiff
Director
Wally Schneiderman
Makeup Artist
David D. Osborn
Writer
George H. Brown
Producer
Ken Hodges
Director of Photography
Courtenay Elliott
Costume Design
John Scott
Original Music Composer
John Trumper
Editor
Gordon Bond
Hairdresser
Ted Karnon
Sound Recordist
Danny Daniel
Liz Charles-Williams
Bert Davey
Art Direction
Lesley De Pettit
Casting