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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
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Released
BBC
Graham Williams
Producer
David Fisher
Writer
Darrol Blake
Director
Dudley Simpson
Original Music Composer
