Last updated 24 March 2024


Episode 4

Series Episode Number: 261

World Premiere: Sat 21 Feb 1970 - 5:15pm BST [BBC One] (United Kingdom)
First Broadcast: Tue 30 Sep 2014 - 8:30pm EDT [Retro TV]
Running Time: 25 minutes

8.20 Million (UK)

Appreciation Index: 60 (UK)

Chart Position: 46 () (UK)

Recorded on Mon 05 Jan 1970 in Television Centre 1
Archive State: PAL Restor



Fearful of a war breaking out between the Silurians and mankind, the Doctor attempts to make peace between the races. But there are those on both sides unwilling to listen.


Production Team hide uncredited
WriterMalcolm Hulke
DirectorTimothy Combe
ProducerBarry Letts
DesignerBarry Newbery
Script EditorTerrance Dicks
Visual Effects DesignerJim Ward
Incidental MusicCarey Blyton
Conducted ByCarey Blyton
Title MusicRon Grainer
and BBC Radiophonic Workshop
Videotape EditorSam Upton (uncredited)
CostumesChristine Rawlins (uncredited)
Make-upMarion Richards (uncredited)
Studio LightingRalph Walton (uncredited)
Studio SoundJohn Staple (uncredited)
Make-upTeresa Wright (uncredited)
Special SoundBrian Hodgson (uncredited)
Production AssistantChris D'Oyly-John (uncredited)
Assistant Floor ManagerSue Hedden (uncredited)
and BBC Radiophonic Workshop (uncredited)
Vision MixerMike Catherwood (uncredited)
Grams OperatorJohn Sanderford (uncredited)
Technical ManagerBernard Fox (uncredited)
Floor AssistantJohn Norton (uncredited)
Location CaterersMossberry Williams (uncredited)
Artist BookingBarbara Buchanan (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)
Technical AdviceDavid Jarvis (uncredited)