Robert CulpWilliam Sebastian

Gig YoungDr. Ham Hamilton

John HurtMitri Cyon

Gordon JacksonInspector Cabell

Ann BellAnitra Cyon

James VilliersSir Geoffrey Cyon

Majel BarrettLilith

Jenny RunacreSydna

Angela GrantButler

Penny IrvingFirst Maid

Vicki MichelleSecond Maid

Lindy BensonThird Maid

Sally FarmiloeFourth Maid

Michael LatimerCo-Pilot

Clive DonnerDirector

Gene RoddenberryScreenplay & Story

Samuel A. PeeplesScreenplay

Gordon ScottProducer