Full Credits
30 members

Suzy Kendall
Julie West

Frank Finlay
Det. Chief Supt. Velyan

Freddie Jones
Reporter

James Laurenson
Greg Lomax

Lesley-Anne Down
Tessa Hurst

Tony Beckley
Leslie Sanford

Anthony Ainley
Mr. Bartell

Dilys Hamlett
Mrs. Sanford

James Cosmo
Det. Sgt. Beale

Marianne Stone
Matron

Allan Cuthbertson
Coroner
Kit Taylor
Doctor
Janet Lynn
Girl in Library

Patrick Jordan
Sgt. Milton
Anabel Littledale
Susan Miller
Tom Chatto
Police Doctor
Jan Butlin
Day Receptionist

William Hoyland
Chemist in Hospital

John Swindells
Desk Sergeant
Jill Carey
Night Receptionist

David Essex
Man in Chemist Shop
Valerie Shute
Girl in Chemist Shop

John Stone
Fire Chief
Siobhan Quinlan
Jenny Greenaway
Patricia Driscoll
Mrs. Hurst (uncredited)

Pat Gorman
Final scene pc (uncredited)
Charles Rayford
Dead Chemist (uncredited)

Renu Setna
Doctor (uncredited)
Reg Thomason
Man in Police Station (uncredited)
Joe Wadham
Police Driver (uncredited)
25 members
Sidney Hayers
Director
Stuart Freeman
Assistant Director
Ene Watts
Continuity
Jan Darnley-Smith
Second Unit Director
Kendal Young
Novel
John Kruse
Screenplay
Peter Rogers
Producer
Tony Wallis
Production Manager
George H. Brown
Producer
Ken Hodges
Director of Photography
George Minassian
Camera Operator
John Cabrera
Second Unit Director of Photography
Eric Rogers
Original Music Composer
Barry Copland
Sound Recordist
Ken Barker
Sound Recordist
William Trent
Sound Editor
Eric Rogers
Conductor
Lionel Couch
Art Direction
William Alexander
Assistant Art Director
Peter Howitt
Set Decoration
Courtenay Elliott
Costume Design
Courtenay Elliott
Costume Designer
Geoffrey Rodway
Makeup Artist
Joyce Woods
Hairdresser
Anthony Palk
Editor