 John HurtSnitter (voice) | Snitter (voice) |
 Christopher BenjaminRowf (voice) | Rowf (voice) |
 James BolamThe Tod (voice) | The Tod (voice) |
 Nigel HawthorneDr. Boycott (voice) | Dr. Boycott (voice) |
 Warren MitchellTyson / Wag (voice) | Tyson / Wag (voice) |
 Judy GeesonPekinese (voice) | Pekinese (voice) |
 Patrick StewartMajor (voice) | Major (voice) |
| BBrian StirnerLaboratory Assistant (voice) | Laboratory Assistant (voice) |
| PPenelope LeeLynn Driver (voice) | Lynn Driver (voice) |
| GGeoffrey MatthewsFarmer (voice) | Farmer (voice) |
 Barbara Leigh-HuntFarmer's Wife (voice) | Farmer's Wife (voice) |
 John BennettDon (voice) | Don (voice) |
 John Franklyn-RobbinsWilliamson (voice) | Williamson (voice) |
 Bill MaynardEditor (voice) | Editor (voice) |
 Malcolm TerrisRobert (voice) | Robert (voice) |
 Rosemary LeachVera (voice) | Vera (voice) |
 Philip LockeCivil Servant #1 (voice) | Civil Servant #1 (voice) |
| BBrian SpinkCivil Servant #2 (voice) | Civil Servant #2 (voice) |
| TTony ChurchCivil Servant #3 (voice) | Civil Servant #3 (voice) |
 Anthony ValentineCivil Servant #4 (voice) | Civil Servant #4 (voice) |
 William LucasCivil Servant #5 (voice) | Civil Servant #5 (voice) |
 Dandy NicholsPhyllis (voice) | Phyllis (voice) |
| PPercy EdwardsAnimal Vocalizations (voice) | Animal Vocalizations (voice) |
