My Brother's Keeper is the fourth and final story in the audio anthology, 1001 Nights, which comprised the one hundred and sixty-eighth release in Big Finish's monthly range. It was written by Emma Beeby and Gordon Rennie and featured Peter Davison as the Fifth Doctor and Sarah Sutton as Nyssa.
The Doctor and Nyssa arrive at a prison on an asteroid in the middle of nowhere. Who is the mysterious warden and what crime has the prisoner committed?
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