Pearl was a representative for Signpost. She was late for work on the day the Sixth Doctor's TARDIS interfered with Signpost's programming, and her co-worker Vishesh Abeyesekere was forced to cover her shift. He eventually found her inside the engines of the station. Pearl and Vishesh developed a symbiosis with the Signpost computer similar to the Doctor's symbiosis with his TARDIS. (PROSE: Outsourcing)

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