Tom Baker
The Doctor
Cast (7)
Mary Tamm
Romana
John Leeson
K-9 (voice)
Beatrix Lehmann
Professor Rumford
Susan Engel
Vivien Fay
Nicholas McArdle
De Vries
Elaine Ives-Cameron
Martha
Crew (5)
Darrol Blake
Director
David Fisher
Writer
Graham Williams
Producer
Anthony Read
Script Editor
Dudley Simpson
Original Music Composer