Last updated 24 March 2024

Cast
Jon PertweeDoctor Who
Caroline JohnLiz Shaw
Nicholas CourtneyBrigadier Lethbridge-Stewart
Olaf PooleyProfessor Stahlman
Christopher BenjaminSir Keith Gold
Derek NewarkGreg Sutton
Sheila DunnPetra Williams
John LeveneSergeant Benton
David SimeonPrivate Latimer
Derek WarePrivate Wyatt
Walter RandallHarry Slocum
Ian FairbairnBromley
Alan ChuntzMurdered Technician
Norton ClarkTechnician (inferno Project)
Bertie GreenTechnician (inferno Project)
Patricia MatthewsTechnician (inferno Project)
Corrine SkinnerTechnician (inferno Project)
June GrayTechnician (inferno Project)
Alan ClementsTechnician (inferno Project)
Keith NorrishTechnician (inferno Project)
Richard CooperTechnician (inferno Project)
Harry TierneyTechnician (inferno Project)
Sheila KnightTechnician (inferno Project)
Joan HarsantTechnician (inferno Project)
Richard LawrenceTechnician (inferno Project)
Richard KingTechnician (inferno Project)
Derek HuntTechnician (inferno Project)
Valerie BlandTechnician (inferno Project)
Robert BirminghamTechnician (inferno Project)
Keith AshleyTechnician (inferno Project)
Michael EarlTechnician (inferno Project)
Caroline JohnSection Leader Elizabeth Shaw
Nicholas CourtneyThe Brigade Leader
Natalia LindleyTechnician (inferno Project)
Marcelle ElliottTechnician (inferno Project)
Colin JamesTechnician (inferno Project)
Roy StreetSoldier (UNIT)
Terry WalshSoldier (UNIT)
Nick HobbsSoldier (UNIT)
Royston FarrellSoldier (UNIT)
Roy ScammellStunt Man
Alan ChuntzStunt Man
Billy HorriganStunt Man
Derek MartinStunt Man
Roy ScammellRSF Sentry
Ronald GoughTechnician (inferno Project)
Barry AshtonTechnician (inferno Project)
Cy TownTechnician (inferno Project)
B G HeathStunt Man
Bruce CoxStunt Man
Keith JamesPatterson
Dave CarterPrimord
Pat GormanPrimord
Philip RyanPrimord
Peter ThompsonPrimord
Judith PollardTechnician (inferno Project)
Steve TierneyTechnician (inferno Project)
Les ConradSoldier (UNIT)
Terry WalshDouble for Doctor Who
Walter HenryPrimord
Dave CarterStunt Man
Roy StreetStunt Man
Ian FairbairnLoudspeaker Voice
Alan ChuntzSoldier (UNIT)
Ian ElliottSoldier (UNIT)
Sue PatersonTechnician (inferno Project)
Alistair BaineTechnician (inferno Project)
Norton ClarkeTechnician (inferno Project)
Production Team
Don HoughtonWriter
Douglas CamfieldDirector
Barry LettsProducer
Jeremy DaviesDesigner
Terrance DicksScript Editor
Fred HamiltonFilm Cameraman
Graham HareFilm Sound
Martyn DayFilm Editor
Christine RawlinsCostumes
Marion RichardsMake-up
Len HuttonVisual Effects Designer
Ron GrainerTitle Music
BBC Radiophonic Workshopand
John GreenStudio Lighting
John StapleStudio Sound
Brian HodgsonSpecial Sound
Ray HiderTechnical Manager
John GormanVision Mixer
Tony PhilpottGrams Operator
Chris D'Oyly-JohnProduction Assistant
Sue HeddenAssistant Floor Manager
Frank MullanFloor Assistant
Judy CainMake-Up Assistant
Sue DuckworthMake-Up Assistant
Irene WallsMake-Up Assistant
Brian MitchellScene Crew
Brian WestScene Crew
Terry StylesCostume Assistant
Pat TriggerCostume Assistant
Hugh MilesFilm Camera Assistant
Jack CurtisFilm Sound Assistant
Sue UptonDirector's Assistant
Delia DerbyshireTitle Music Arranger
Bernard LodgeTitle Sequence
HAVOCAction by
Barry LettsDirector
Lance WoodTechnical Manager
BBC Radiophonic WorkshopSpecial Sound