Place of Origin:
The Battle of Ranskoor Av Kolos
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Greston Paltraki was the captain of a ship under the authority of the Congress of the Nine Planets. His home planet was Stebble.
Greston Paltraki was found, alone, on his ship by the Thirteenth Doctor, Yaz, Ryan and Graham.
Because he had been exposed to the psychotropic waves on the planet Ranskoor Av Kolos, Paltraki couldn’t even remember his name