Snitter
John Hurt
Rowf
Christopher Benjamin
The Tod
James Bolam
Dr. Boycott
Nigel Hawthorne
Tyson
Warren Mitchell
Pekinese (voice)
Judy Geeson
Stephen Powell
Bernard Hepton
Major (voice)
Patrick Stewart
Laboratory Assistant
Brian Stirner
Lynn Driver
Penelope Lee
Farmer
Geoffrey Mathews
Farmer's Wife
Barbara Leigh-Hunt
Don (voice)
John Bennett
Williamson
John Franklyn-Robbins
Editor
Bill Maynard
Robert
Malcolm Terris
Vera (voice)
Rosemary Leach
Civil Servant 1
Philip Locke
Civil Servant 2
Brian Spink
Civil Servant 3
Tony Church
Civil Servant 4
Anthony Valentine
Civil Servant 5
William Lucas
Phyllis
Dandy Nichols
Vera
Rosemary Leach