Part One
Series Episode Number: 558World Premiere: Mon 18 Jan 1982 - 6:56pm GMT [BBC One: Not Wales] (United Kingdom)
First Broadcast: Sun 1 May 1983 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 23 minutes 36 seconds
8.40 Million (UK)
Chart Position: 66 () (UK)
Recorded on Mon 13 Apr 1981 in Television Centre 6
The arrival of the TARDIS is observed by three Urbankans via their manopticon devices. Intrigued, they begin dividing the Doctor's friends, and disguising themselves as humans
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