Last updated 26 March 2023

Episode Four

Episode Four

Series Episode Number: 307

World Premiere: Sat 22 Jan 1972 - 5:51pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 10 Oct 1975 - 6:30pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 17 seconds

9.10 Million (UK)

Chart Position: 40 () (UK)

Recorded on Tue 19 Oct 1971 in TC8
Archive State: PAL 2 VT

The Controller betrays the Daleks and is exterminated. The Daleks travel back in time to the 20th Century to ensure that the peace conference fails.