Part FiveSeries Episode Number: 478
World Premiere: Sat 4 Mar 1978 - 6:26pm GMT [BBC One] (United Kingdom)
First Broadcast: Fri 15 Feb 1980 - 5:30pm CST [WTTW 11 Chicago]
Running Time: 25 minutes
10.30 Million (UK)
Chart Position: 32 () (UK)
Recorded on Sun 06 Nov 1977 in TC8
The Sontarans have taken control of the Capital on Gallifrey and intend to use the power of the Time Lords to rampage through all of time.