Doctor Who: Silver Nemesis (1988)

Doctor Who: Silver Nemesis
Science Fiction, Drama, Adventure, TV Movie
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?"
Starring
Sylvester McCoy, Sophie Aldred, Anton Diffring, Fiona Walker, Gerard Murphy, Leslie French, Dolores Gray, David Banks, Mark Hardy, Metin Yenal
Directed By
Chris Clough