The Meercocks were a race that resembled the Martians in H. G. Wells' novel The War of the Worlds. They had tentacles, smelled like sulphur, and sat in giant metallic eggcups with three stilts.

The Valceans destroyed the Meercocks' homeworld. Verdigris found the spacecraft with the last survivors in the 1970s. The ship was the size and shape of St Pancras railway station and had train-shaped shuttles to go to planetary surfaces. He convinced them to invade Earth by imitating fictional characters like Little Red Riding Hood and the Big Bad Wolf. After Verdigris' plot was stopped by the Third Doctor, Iris Wildthyme helped the Meercocks find a new home. (PROSE: Verdigris)

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