Doctor Doctor Who Guide

Last updated 09 January 2020

Part One

Series Episode Number: 484

World Premiere: Sat 30 Sep 1978 - 6:22pm BST [BBC One] (United Kingdom)
First Broadcast: Sun 30 Aug 1981 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 25 minutes 5 seconds

9.10 Million (UK)

Appreciation Index: 61 (UK)

Chart Position: 30 () (UK)

Recorded on Mon 22 May 1978 in Television Centre 6


The Doctor, Romana and K9 face new dangers searching for the second segment to the Key to Time. What has happened to the planet it is hidden on?

Instead of landing on Calufrax as originally intended, they arrive on a different planet and encounter the Mentiads, and the strange Captain.

Characters hide uncredited
Doctor WhoTom Baker
RomanaMary Tamm
CaptainBruce Purchase
Mr. FibuliAndrew Robertson
BalatonRalph Michael
PralixDavid Sibley
KimusDavid Warwick
MulaPrimi Townsend
CitizenClive Bennett
MentiadBernard Finch
GuardAdam Kurakin
Voice of K-9John Leeson
(extra)Franklyn Arbisman (uncredited)
(extra)Derek Hunt (uncredited)
(extra)James Muir (uncredited)
(extra)Clinton Morris (uncredited)
(extra)Gus Roy (uncredited)
(extra)Julie La Rousse (uncredited)
(extra)Douglas Roe (uncredited)
(extra)John Cannon (uncredited)
(extra)Bill Hughes (uncredited)
(extra)Barbara Hampshire (uncredited)
(extra)Malcolm Ross (uncredited)
(extra)Terence Ward (uncredited)
(extra)Annette Peters (uncredited)
(extra)Barry Hayes (uncredited)
(extra)Les Conrad (uncredited)
(extra)Ray Knight (uncredited)
(extra)Bryoman Powell (uncredited)
(extra)Colin Thomas (uncredited)
(extra)Clive Rogers (uncredited)
(extra)Peter Whlttaker (uncredited)
(extra)Derek Southern (uncredited)
(extra)Michael Britton-Jones (uncredited)
(extra)Budd Breoon (uncredited)
(extra)John Cadwallader (uncredited)
(extra)Jeff Cryer (uncredited)
(extra)Jack Sholomire (uncredited)
(extra)Edward Wyman (uncredited)
(extra)Bernard Plant (uncredited)
MentiadKenny Kordell (uncredited)
(extra)Michael Kelligan (uncredited)
(extra)Dennis Johns (uncredited)
(extra)Johnny Daulton (uncredited)
(extra)Stuart McNiel (uncredited)
(extra)Roger Middleton (uncredited)
(extra)Ralph Lincoln (uncredited)