Doctor Who - Season 9 Episode 19 -
The Mutants (5)
The planet Solos in the 30th century. As Earth slowly moves towards granting Solos its independence, the Doctor and Jo arrive on a mission for the Time Lords. How far will the brutal Marshal go to retain his power over the planet? And why are the native Solosians undergoing a gradual mutation into hideous, insect-like creatures?
Please explain the problem in a few words.
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Max 255 characters.