The Fifth Galactic Surveyor Corps were a survey team of human pioneers exploring a ruined city on a planet orbiting a pulsar in 2724.

They were originally commanded by Woodbridge before she was killed by the Quiet Ones. Dr Sophie Topolovic took charge, leading her colleagues Callaghan, Miles and Gough. Sophie reluctantly worked together with the Second Doctor to try to stop, and later flee from, the Quiet Ones. The Doctor stayed behind to open the door to the surface for the rest of them to escape to, as the outside door could only be opened from the control room. The Doctor eventually left the base, and explained he had made contact with the Quiet Ones, and agreed to a truce in which Sophie's team could continue to safely learn about and communicate with the Quiet Ones, if they did it more quietly. While minutes had passed outside, for the Doctor it was a few years. (AUDIO: Shadow of Death)

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