Last updated 24 March 2024


Episode Four

Series Episode Number: 337

World Premiere: Sat 17 Feb 1973 - 5:51pm GMT [BBC One] (United Kingdom)
First Broadcast: Thu 20 Nov 2014 - 8:30pm EST [Retro TV]
Running Time: 24 minutes 10 seconds

8.40 Million (UK)


Chart Position: 27 () (UK)

Recorded on Tue 04 Jul 1972 in TC6
Archive State: PAL 2 VT



The Doctor is desperate to save the lives of Jo and everyone trapped inside the Miniscope, but is hindered by the Inter Minorans who have their own agenda.