Last updated 24 March 2024

Cast
Patrick TroughtonDr. Who
Anneke WillsPolly
Michael CrazeBen
Frazer HinesJamie
Catherine HoweAra
Tom WatsonRamo
Peter StephensLolem
Colin JeavonsDamon
Joseph FurstZaroff
Michael EarlAtlantean Guard
Dean HardyAtlantean Guard
Derek HuntAtlantean Guard
Keith AshleyAtlantean Guard
Alex DonaldZaroff Guard
Tony DouglasZaroff Guard
Denis RedwoodAtlantean Priest
David WatermanAtlantean Priest
Leonard KingstonAtlantean Priest
Peter StockbridgeAtlantean Priest
Lawrence ArcherAtlantean Priest
Reg CranfieldAtlantean Priest
Bob RaymondAtlantean Priest
Fred DavisAtlantean Priest
Darroll RichardsAtlantean Priest
Stanely JacombAtlantean Priest
Anthony KempChild Priest
Gary O'BrienChild Priest
Samuel DurleighChild Priest
Shane YoungerChild Priest
Cathy AshFish Person
Judy NichollsFish Person
Mary McMillanHalf-Fish Person (flying)
Perin LewisFish Person
Tony StarrHalf-Fish Person (flying)
Nigel ClaytonFish Person
Derek CalderFish Person
Gerald TaylorDamon's assistant
Graham AshleyOverseer
Tony HandyZaroff's guard
Paul AnilJacko
P G StephensSean
Noel JohnsonThous
Alan VicarsLaboratory Assistant
Robin ScottLaboratory Assistant
Royston FarrellLaboratory Assistant
Alex DonaldZaroff's guard
Tony DouglasZaroff's guard
Sonny WillisAtlantean Guard
Ronald GoughAtlantean Guard
Roma WoodnuttNola
Gordon LangAtlantean Priest
Hein ViljoanAtlantean Priest
Royston FarrellAtlantean Priest
Peter StockbridgeMan in Market
Reg CranfieldMan in Market
John AdamsMan in Market
Alex DonaldAtlantean Priest
Tony DouglasAtlantean Priest
Bill BurridgeExecutioner Priest
Marguerite YoungAtlantean Refugee
Mary WheelerAtlantean Refugee
Anthony KempAtlantean Child Priest
Samuel BurleighAtlantean Child Priest
Shane YoungerAtlantean Child Priest
Gary O'BrienAtlantean Child Priest
Ralph WatsonOverseer
Ralph WatsonFish Voice
Philip JosteAtlantean Refugee
Robin ScottAtlantean Refugee
Royston FarrellAtlantean Refugee
Jimmy MacRefugee Priest
Alex DonaldHalf Fish Person
Gary O'BrienAtlantean Child
Edmond O'DwyerAtlantean Child