The Doctor, Rose and Captain Jack discover a Slitheen is behind a plan to build a nuclear power station in Cardiff.
“Boom Town” is the eleventh episode of the first series of the British science fiction television programme Doctor Who, which was first broadcast on BBC One on 4 June 2005. It was written by executive producer Russell T Davies and directed by Joe Ahearne.
In the episode, alien time traveller the Doctor (Christopher Eccleston) and his companions Rose Tyler (Billie Piper) and Jack Harkness (John Barrowman) travel to modern-day Cardiff and meet up with Rose’s boyfriend, Mickey Smith (Noel Clarke). There, they discover a recent enemy, the Slitheen Margaret Blaine (Annette Badland) is alive and willing to destroy the planet to ensure her freedom.
“Boom Town” was a replacement episode for a story that was to be written by Paul Abbott, but he had to abandon the script because he had other commitments. Davies decided to write a different story centred around bringing Badland’s character back from the fourth and fifth episodes, as he had enjoyed her performance. Primarily, Davies wanted to explore the consequences of the Doctor’s actions and question whether he had the right to sentence an enemy to death. The episode was also intended to show off Cardiff, where the revived Doctor Who series is made, and was filmed there in February 2005. “Boom Town” was watched by 7.68 million viewers in the United Kingdom and received mixed reviews from critics.