Doctor Who (Big Finish)

The Sandman (1x37)

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When the Sixth Doctor and Evelyn visit the Clutch — a large community of spacecraft that never settle on one planet — Evelyn discovers that the Doctor is held in fear by the Galyari. They know him as "the Sandman", a figure from their mythology, an ancient bogeyman — and the Doctor does not deny being that which they regard with fear.