description: 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?
language: English
title: Doctor Who: The Catalyst
titlecomplete: Doctor Who: The Catalyst
characters: Leela, The Fourth Doctor
genres: Audiobook, Science Fiction, Doctor Who
ratings_count: 131
series: The Companion Chronicles, Adventures of the 4th Doctor
publisher: Big Finish Productions