Paul Chapman
— Milton Ashe
Ian Ogilvy
— Herbie, RB34
Hamilton Dyce
— Dr. Lanning
Wendy Gifford
— Dr. Susan Calvin
Gerald Sim
— Dr. Bogert
Robert James
— Kelvin Brooke
Edwin Richfield
— Jamieson
Roy Hanlon
— Hargreaves
Jenny Russell
— Mary Curl
Anna Perry
— Brooke's Secretary
Rita Davies
— Receptionist
Jumoke Debayo
— Cleaner