Episode Two
Series Episode Number: 319World Premiere: Sat 15 Apr 1972 - 5:51pm BST [BBC One] (United Kingdom)
First Broadcast: Tue 30 Sep 1975 - 6:30pm CDT [WTTW 11 Chicago]
Running Time: 24 minutes 24 seconds
7.80 Million (UK)
Chart Position: 38 () (UK)
Recorded on Tue 29 Feb 1972 in TC4
Archive State: RSC conver
Fearing Jo has died in Solos's hostile environment, the Doctor is forced to work with the scientist, Jaeger, to make the planet's atmosphere breathable for humans.
Home Region: