Last updated 24 March 2024


Episode 1

Series Episode Number: 215

World Premiere: Sat 14 Sep 1968 - 5:17pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 19 Oct 1986 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 22 minutes 20 seconds

6.60 Million (UK)

Appreciation Index: 51 (UK)

Chart Position: 55 () (UK)

Recorded on Fri 21 Jun 1968 in Television Centre 3
Archive State: 16mm t/r



The Doctor activates an emergency unit on board the TARDIS to escape destruction by a volcanic eruption.

Unfortunately, it moves them out of normal space and time to a deadly world where fantasy rules. The travelers find themselves lured out of the ship into a ghostly white void.


Production Team hide uncredited
WriterDerrick Sherwin (uncredited)
DirectorDavid Maloney
ProducerPeter Bryant
DesignerEvan Hercules
Script EditorDerrick Sherwin
Title MusicRon Grainer
and the BBC Radiophonic Workshop
CostumesMartin Baugh (uncredited)
Make-upSylvia James (uncredited)
LightingHoward King (uncredited)
SoundJohn Holmes (uncredited)
Visual Effects DesignerJack Kine (uncredited)
Visual Effects DesignerBernard Wilkie (uncredited)
Production AssistantJohn Lopes (uncredited)
Assistant Floor ManagerEdwina Verner (uncredited)
Floor AssistantGavin Birkett (uncredited)
AssistantJudy Shears (uncredited)
Grams OperatorPat Heigham (uncredited)
Technical ManagerFred Wright (uncredited)
BookingsBarbara Buchanan (uncredited)
BookingsHilary Turnbull (uncredited)
Production SecretarySandra Brenholz (uncredited)
Special SoundBrian Hodgson (uncredited)
Title Music ArrangerDelia Derbyshire (uncredited)
Title SequenceBernard Lodge (uncredited)