Episode Five
Series Episode Number: 354World Premiere: Sat 16 Jun 1973 - 5:52pm BST [BBC One] (United Kingdom)
First Broadcast: Tue 25 Nov 2014 - 8:00pm EST [Retro TV]
Running Time: 25 minutes 20 seconds
8.30 Million (UK)
Chart Position: 15 () (UK)
Recorded on Thu 19 Apr 1973 in TC3
Archive State: PAL 2 VT
Captain Mike Yates is taken over by the super computer, BOSS, and ordered to kill the Doctor. Cliff and Jo are trapped by the maggots as UNIT launch their attack.