Richard Attenborough
Dougall
Diane Hart
Doreen
Virginia McKenna
Catherine
Mary Germaine
Gerda
Susan Stephen
Bicky
Heather Thatcher
Lady Buckering
Peter Hammond
Roly
Noel Purcell
Shaughnessy
George Thorpe
Dr. Drew
Jack Watling
Clifford Magill
Brian Worth
Wilfred
Sid James
Taxi Driver
Ambrosine Phillpotts
Nurse Pynegar
Harry Locke
Little Man
Jonathan Field
Zoo Keeper
Wensley Pithey
Policeman
Henry Cass
Director
Erwin Hillier
Director of Photography
Victor Skutezky
Producer
Edward B. Jarvis
Editor
Philip Green
Original Music Composer
Donald M. Ashton
Art Direction
Robert Lennard
Casting
Anne Burnaby
Screenplay
Norman Warwick
Camera Operator
Wilfred Eades
Production Manager
Harold V. King
Sound Director
Cecil Thornton
Sound Recordist
A. G. Scott
Hairstylist
Cliff Owen
Assistant Director