Cast
Arriving on Space Station Nerva in its distant past, the Doctor, Sarah and Harry find its crew threatened by a mysterious plague. Discovering that things are not as they seem, they uncover a Cyberman plot to destroy Voga, planet of gold.
Tom Baker (Acting)
Elisabeth Sladen (Acting)
Ian Marter (Acting)
Ronald Leigh-Hunt (Acting)
William Marlowe (Acting)
Kevin Stoney (Acting)
David Collings (Acting)
Michael Wisher (Acting)
Brian Grellis (Acting)
30 March 1985
2 April 1977
3 February 1984
24 July 1965
24 September 1977
18 November 1978
21 February 1981
8 June 1974
21 July 2009
17 December 1977
9 March 1968
16 December 1978
21 October 1978
12 January 1985
9 February 1985
6 December 1986
15 February 1964
8 June 2013
22 September 1979
26 January 1983
10 May 1975