Last updated 24 March 2024


Part Three

Series Episode Number: 544

World Premiere: Sat 17 Jan 1981 - 5:11pm GMT [BBC One] (United Kingdom)
First Broadcast: Wed 1 Apr 2015 - 8:00pm EDT [Retro TV]
Running Time: 22 minutes 15 seconds

8.30 Million (UK)


Chart Position: 59 () (UK)

Recorded on Thu 02 Oct 1980 in Television Centre 1



As the void begins to shrink around them, Rorvik plans to take desperate measures to escape through the mirror. The Doctor discovers the dark secret of the Tharils' past.


Production Team hide uncredited
WriterStephen Gallagher
DirectorPaul Joyce
ProducerJohn Nathan-Turner
Executive ProducerBarry Letts
DesignerGraeme Story
Script EditorChristopher H Bidmead
Title SequenceSid Sutton
Costume DesignerJune Hudson
Make-up ArtistPauline Cox
Studio LightingJohn Dixon
Studio SoundAlan Fogg
Technical ManagerJohn Dean
Senior CameramanAlec Wheal
Videotape EditorRod Waldron
Visual Effects DesignerMat Irvine
Video EffectsRobin Lobb
Vision MixerJim Stephens
Production AssistantGraeme Harper
Production Unit ManagerAngela Smith
Director's AssistantJoyce Stansfield
Assistant Floor ManagerVal McCrimmon
Incidental MusicPeter Howell
Special SoundDick Mills
Studio EngineerDave Murphy (uncredited)
Grams OperatorGordon Phillipson (uncredited)
Assistant Costume DesignerSarah Leigh (uncredited)
BookerNansi Davies (uncredited)
Design AssistantRoger Harris (uncredited)
Show Working SupervisorHarry Randall (uncredited)
Production SecretaryJane Judge (uncredited)
Make-Up AssistantLesley Holmes (uncredited)
Make-Up AssistantWendy Holmes (uncredited)
Make-Up AssistantHelen Johnson (uncredited)
Contracts AssistantJonathan McLeish (uncredited)
Gundan MakerRoger Oldhamstead (uncredited)
Floor AssistantLaura Gilbert (uncredited)
GraphicsIan Hewett (uncredited)
Props BuyerGill Meredith (uncredited)
FacilitiesCarole Vigurs (uncredited)
Effects AssistantBryony Keating (uncredited)
Effects AssistantSteve Lucas (uncredited)
Effects AssistantCharlie Lumm (uncredited)
Effects CameramanGene Carr (uncredited)
Lighting ChargehandLes Calder (uncredited)
Trainee Production AssistantSue Davis (uncredited)
Title MusicRon Grainer (uncredited)
Title Music ArrangerPeter Howell (uncredited)