John Hurt as Snitter (voice)

Christopher Benjamin as Rowf (voice)

James Bolam as The Tod (voice)

Nigel Hawthorne as Dr. Boycott (voice)

Warren Mitchell as Tyson / Wag (voice)

Judy Geeson as Pekinese (voice)

Patrick Stewart as Major (voice)

Brian Stirner as Laboratory Assistant (voice)

Penelope Lee as Lynn Driver (voice)

Geoffrey Matthews as Farmer (voice)

Barbara Leigh-Hunt as Farmer's Wife (voice)

John Bennett as Don (voice)

John Franklyn-Robbins as Williamson (voice)

Bill Maynard as Editor (voice)

Malcolm Terris as Robert (voice)

Rosemary Leach as Vera (voice)