Last updated 18 August 2023

Cast
Jon PertweeDoctor Who
Caroline JohnLiz Shaw
Nicholas CourtneyBrigadier Lethbridge-Stewart
Fulton MackayDr. Quinn
Norman JonesMajor Baker
Peter MilesDr. Lawrence
Thomasine HeinerMiss Dawson
Ian CunninghamDr. Meredith
Roy BranniganRoberts
John NewmanSpencer
Bill MatthewsDavis
John SpradburyUNIT Soldier
Sheila KnightReceptionist
Brian JohnSecurity Guard
Patrick MilnerSecurity Guard
Alan VicarsTechnician
Alex HoodTechnician
Barry KenningtonTechnician
Cara StevensTechnician
Cy TownTechnician
David BillaTechnician
Joan HarsantTechnician
Keith AshleyTechnician
Keith GoodmanTechnician
Margaret PilbeauTechnician
Mary DentonTechnician
Michael EarlTechnician
Michael LomaxTechnician
Norton ClarkTechnician
Richard LawrenceTechnician
Ronald GoughTechnician
Paul DarrowCaptain Hawkins
Nancie JacksonDoris Squire
Pat GormanSilurian
Peter HallidaySilurian Voice
Gordon RichardsonSquire
Cara StevensTechnician
John SpradburyTechnician
Sheila KnightTechnician
Alan ClementsUNIT Soldier
Alex HoodUNIT Soldier
Antonio de MaggioUNIT Soldier
Bernard BarnsleyUNIT Soldier
Bryan NolanUNIT Soldier
Jim DelaneyUNIT Soldier
John DoyleUNIT Soldier
Mark JohnsonUNIT Soldier
Pat MatthewsTechnician
Olive MacheilTechnician
Geoffrey PalmerMasters
Richard SteeleSergeant Hart
Ian TalbotTravis
Dave CarterOld Silurian
Nigel JohnsYoung Silurian
Paul BartonSilurian
Simon CainSilurian
John ChurchillSilurian
Pat MatthewsTechnician
Harry SwiftPrivate Robins
Pat GormanSilurian Scientist
John SpradburyUNIT Soldier
Alan MasonCorporal Nutting
David PollittPrivate Wright
Brendan BarryHospital Doctor
Bella EmbergNurse
Gillian TollResearch Centre Nurse
Dave CarterAmbulanceman
Mostyn EvansCabbie
Aileen LewisLondon extra
Alison DaumlerLondon extra
Betty RichardsonLondon extra
B G HeathLondon extra
Brenda SkiltonLondon extra
Bruce CoxLondon extra
Colin CunninghamLondon extra
Constance CarlingLondon extra
David ParryLondon extra
Denis McTigheLondon extra
Elizabeth PowerLondon extra
George RomanovLondon extra
Harold HorshamLondon extra
Harold WhiteLondon extra
Hugh CecilLondon extra
Iona MacRaeLondon extra
Jean HyltonLondon extra
Jean ShannonLondon extra
Jim DelaneyLondon extra
Joanna LawrenceLondon extra
John ShorterLondon extra
Josie DentLondon extra
Joyce WindsorLondon extra
Leslie ShannonLondon extra
Lyn TurnerLondon extra
Maureen NelsonLondon extra
Michael MoorLondon extra
Natalia LindleyLondon extra
Pat MatthewsLondon extra
Peter BlackburnLondon extra
Peter BrettLondon extra
Peter RayLondon extra
Rex RashleyLondon extra
Richard KingLondon extra
Rosina StewartLondon extra
Roy DentonLondon extra
Roy PearceLondon extra
Stenson FalckeLondon extra
Stuart MyersLondon extra
Sue CastersLondon extra
Walter HenryLondon extra
Willy BowmanLondon extra
Winnifred RayLondon extra
Ronald GoughTechnician
Terence DenvilleUNIT Soldier
Pierce McEvoyUNIT Soldier
David MelbourneUNIT Soldier
Roger MinnisUNIT Soldier
Dave CarterSilurian
Brian HaughtonUNIT Soldier
Sheila KnightReceptionist
Alex DonaldUNIT Soldier
Peter HolmesTechnician
Richard KingTechnician
Leonard KingstonTechnician
Stuart MyersTechnician
Production Team
Malcolm HulkeWriter
Timothy CombeDirector
Barry LettsProducer
Barry NewberyDesigner
Carey BlytonIncidental Music
Ron GrainerTitle Music
BBC Radiophonic Workshopand
Terrance DicksScript Editor
Christine RawlinsCostumes
Marion RichardsMake-up
Sam UptonVideotape Editor
Ralph WaltonStudio Lighting
John StapleStudio Sound
Teresa WrightMake-up
Brian HodgsonSpecial Sound
Chris D'Oyly-JohnProduction Assistant
Fred HamiltonFilm Cameraman
Bill HuthbertFilm Editor
Sue HeddenAssistant Floor Manager
Jim WardVisual Effects Designer
Mike CatherwoodVision Mixer
BBC Radiophonic Workshopand
John SanderfordGrams Operator
Bernard FoxTechnical Manager
John NortonFloor Assistant
Mossberry WilliamsLocation Caterers
Barbara BuchananArtist Booking
Delia DerbyshireTitle Music Arranger
Bernard LodgeTitle Sequence
David JarvisTechnical Advice
Carey BlytonConducted By