Episode Six
Series Episode Number: 355World Premiere: Sat 23 Jun 1973 - 5:50pm BST [BBC One] (United Kingdom)
Running Time: 26 minutes 6 seconds
7.00 Million (UK)
Chart Position: 30 () (UK)
Recorded on Mon 30 Apr 1973 in TC3
Archive State: PAL 2 VT
Cliff is dying and the maggots are on the verge of transforming into giant flying insects. Time is running out for the Doctor as BOSS launches its plan for world domination.