Episode Four
Series Episode Number: 341World Premiere: Sat 17 Mar 1973 - 5:50pm GMT [BBC One] (United Kingdom)
First Broadcast: Sun 19 Apr 1987 - 11:00pm CDT [WTTW 11 Chicago]
Running Time: 23 minutes 35 seconds
7.10 Million (UK)
Chart Position: 55 () (UK)
Recorded on Tue 17 Oct 1972 in TC3
Archive State: PAL 2 VT
The Doctor and Jo are the Master's prisoners. In a bid to escape, the Doctor makes a dangerous spacewalk.
Home Region: