The Doctor finds that the subterranean UK Habitat is run by a cloistered robot named Drathro, whom the inhabitants call "The Immortal." Their black light energy converters are destabilizing, unaware that it's the result of two space pirates mucking about on the surface with designs on looting their dwelling. Written by
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[looking on as tribesmen build a pyre for Sabalom Glitz
What a terrible waste.
You're tellin' me?
No, I meant the wood. Now, if I'd a hand in this execution I'd go with a bullet in the back o' the 'ead. Much more economical.
He has a point.
Of all the snivilin' skreez t' be stuck with in my moment of need, I have to get you two.