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See broadcasts for Big Finish ReleaseThe Catalyst

Last updated 02 January 2017
The Catalyst
Released: Thursday 31st January 2008
9:00pm GMT < > « » Premiere < > « »
Big Finish Release
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Featuring: Louise Jameson, Timothy Watson

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?
Synopsis Source: Doctor Who Guide
Released Source: Big Finish