Credits
Cast
Tom Baker
The Doctor
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
Perry Brahan
Special Effects Assistant
Elizabeth Parker
Special Sound Effects
Directing
Darrol Blake
Director
Production
Graham Williams
Producer
Sound
Dudley Simpson
Original Music Composer
Delia Derbyshire
Theme Song Performance
Visual Effects
Mitch Mitchell
Visual Effects
Mat Irvine
Visual Effects Designer
Writing
Anthony Read
Script Editor
David Fisher
Writer