Last updated 24 March 2024


Episode One

Series Episode Number: 232

World Premiere: Sat 25 Jan 1969 - 5:16pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 9 Nov 1986 - 11:00pm CST [WTTW 11 Chicago]
Running Time: 23 minutes 11 seconds

6.60 Million (UK)

Appreciation Index: 57 (UK)

Chart Position: 68 () (UK)

Recorded on Fri 03 Jan 1969 in Lime Grove D
Archive State: 16mm t/r



The TARDIS arrives on 21st Century Earth where all long distance journeys are made instantaneously by T-Mat. But aliens have invaded the T-Mat relay station on the Moon, and they're about to cause havoc...


Production Team hide uncredited
WriterBrian Hayles
DirectorMichael Ferguson
ProducerPeter Bryant
DesignerPaul Allen
Script EditorTerrance Dicks
Film CameramanPeter Hall (uncredited)
Film SoundRon Blight (uncredited)
Film EditorMartyn Day (uncredited)
LightingHoward King (uncredited)
SoundBryan Forgham (uncredited)
CostumesBobi Bartlett
Make-upSylvia James (uncredited)
Incidental MusicDudley Simpson
Visual Effects DesignerBill King (uncredited)
Visual Effects Designer Trading Post (uncredited)
Special SoundBrian Hodgson (uncredited)
Title MusicRon Grainer
and the BBC Radiophonic Workshop
Vision MixerChris Griffin (uncredited)
Grams OperatorJohn Lloyd (uncredited)
Assistant Floor ManagerTrina Cornwell (uncredited)
Floor AssistantJohn Norton (uncredited)
Production AssistantFiona Cumming (uncredited)
Film Operations ManagerHugh Wilson (uncredited)
Film Camera AssistantMike Spooner (uncredited)
Film Sound AssistantI H Morton (uncredited)
Film Sound AssistantRon Keightley (uncredited)
Design AssistantPeter Blacken (uncredited)
Director's AssistantRaquel E. Ebbutt (uncredited)
Artist BookingBarbara Buchanan (uncredited)
Title SequenceBernard Lodge (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)