December 7, 1988
1h 15m
EN
Chris Clough
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
The Doctor
Sophie Aldred
Ace
Anton Diffring
De Flores
Fiona Walker
Lady Peinforte
Kevin Clarke
7
Gerard Murphy
Richard
Leslie French
Mathematician
Dolores Gray
Mrs Remington
David Banks
Cyber Leader
Mark Hardy
Cyber Lieutenant
Metin Yenal
Karl
BBC
GB
