The Fifth Doctor, Tegan and Turlough arrive on Sea Base 4, a nuclear warhead station under the sea that has some very nasty neighbours.
DirectorPennant Roberts
WritersJohnny Byrne, Eric Saward
2
Male
Acting
1
Female
6.0
Movie
2024
7.7
2014
6.3
2022
6.7
2007
7.1
2008
2019
8.2
2013
6.5
1992
7.2
2009
6.4
1968
5.4
1988
1989
5.2
6.6
2002
6.9
2006
3.3
7.4
7.6
1995
1984
