Blackpool
Blackpool was a seaside town on the Fylde Coast of England, notable for being the home town of two of the Doctor's companions: Lucie Miller and Clara Oswald. (AUDIO: Death in Blackpool, TV: Robot of Sherwood)
Lucie was a companion of the Eighth Doctor. She was born in the town on 31 July 1988. (AUDIO: Brave New Town) Clara Oswald, a companion of both the Eleventh and Twelfth Doctors was born in the town one year later in 1989.
As a child, Clara got lost on Blackpool beach on a bank holiday and was terrified until her mother found her and helped her to conquer her fear of getting lost. (TV: The Rings of Akhaten)
The Doctor and his companions visited it on occasion. The Fourth Doctor recalled his visit to the town when Leela told him that the Trogs ate processed rock. (TV: Underworld) Later, the Sixth Doctor and Peri Brown visited Blackpool in 1985. (PROSE: The Nightmare Fair / AUDIO: The Nightmare Fair)
Behind the scenes
The Sixth Doctor and Peri Brown were to visit Blackpool on screen in a script written for the 1986 season of Doctor Who. However, the series was placed on hiatus. Instead, the story was released as a book and later as a Big Finish audio play. (PROSE: The Nightmare Fair / AUDIO: The Nightmare Fair) Despite being the home of two companions and mentioned numerous times, Blackpool has never explicitly appeared on screen.
Jenna-Louise Coleman, the actress who plays Clara Oswald, was born in Blackpool.