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Last updated 17 April 2017

Doctor Who: The Catalyst

The Catalyst

Release Number: 8 (BF)


Big Finish


Writer: Nigel Fairs
Director: Nigel Fairs

Featuring: Louise Jameson, Timothy Watson


Big Finish Release (United Kingdom):
First Released: Thursday 31st January 2008
Running Time: 1 hour



The pride of the Z'nai matches that of Leela of the Sevateem. Why would the Doctor imprison one in such an unlikely place, and what terrors will be brought about by letting it loose?