Cast
The arrival of a mysterious comet heralds impending danger from enemies both old and new. As Ace helps the Doctor defend Earth, she is confronted with a dangerous question..."Doctor Who?"
Sylvester McCoy (Acting)
Sophie Aldred (Acting)
Anton Diffring (Acting)
Fiona Walker (Acting)
Gerard Murphy (Acting)
Leslie French (Acting)
Dolores Gray (Acting)
David Banks (Acting)
25 December 2006
7 December 1987
12 July 2007
21 December 2010
22 June 1955
15 November 2007
25 May 1983
29 May 2013
12 December 1969
18 November 2015
20 November 2012
21 June 1996
24 December 2003
14 February 2002
10 February 2012
25 December 2008
20 October 2006
6 July 2011
25 November 1992
29 July 1994
7 December 1988