made him the first performer to appear in both the original and current run of Doctor Who. He later played Geraint Cooper, the father of Gwen Cooper, in the Doctor Who spinoff series Torchwood. Davies stated that he originally intended to call this episode "Dining with Monsters". He joked that a much better name for this episode would be "What should we do with Margaret?" Davies intended the episode to be a character piece exploring whether the Doctor had the authority to take someone to their death sentence, as well as showing the consequences of the Doctor's actions the last time he met Margaret. The storyline was fitting for Eccleston's war-torn Doctor. The consequences of the Doctor's lifestyle are also explored through Rose's boyfriend Mickey, who has been forced to move on because she is not around. The resolution is a deliberate deus ex machina, regressing Margaret so she can start anew, although Davies remarked that the resolution did not come completely out of nowhere as the TARDIS' psychic link had been already established. Much of "Boom Town" was filmed on Cardiff Bay, with one scene in particular in front of the Millennium Centre, in February 2005. The Doctor is seen reading the Welsh newspaper Western Mail; Davies stated that he wanted to incorporate Welsh culture because the series is made in Wales and contains a lot of Welsh crew members. He also wanted to show off how beautiful the area could be. The night shoot of Rose and Mickey in front of the water tower at Roald Dahl Plass had to be extended to two nights because it was below the temperature at which the fountain automatically shuts off. The dinner scene between the Doctor and Margaret was filmed in January 2005 at the Cardiff restaurant Bistro 10 before the rest of the episode was filmed; Eccleston filmed the scene while Piper and Barrowman were filming scenes for "The Empty Child". This was due to scheduling conflicts with Badland. Some of the schedule was also rearranged because of the death of Piper's uncle, resulting in her and Eccleston being replaced by doubles during some scenes near the end of the episode. The egg Margaret turns into was a reused prop from the second episode, "The End of the World". Broadcast and reception "Boom Town" was first broadcast in the United Kingdom on 4 June 2005 on BBC One. The