Martin LandauCommander John Koenig Barbara BainDoctor Helena Russell Barry MorseProfessor Victor Bergman Nick TateCaptain Alan Carter Prentis HancockPaul Morrow Zienia MertonSandra Benes Roy DotriceCommissioner Gerald Simmons Anthony ValentineMale Alien Philip MadocCommander Anton Gorski Patrick AllenLuna Commission Chairman Christopher MatthewsMain Mission Operator Christopher PenfoldScreenplay Gerry AndersonExekutiv producent David LaneSupervising Editor Ron FryProduction Manager 
