Ng remarked that Jack Harkness sometimes went to outer space or Carmarthen. (AUDIO: Tagged)
Gwen Cooper went to Carmarthen as a child. (PROSE: Border Princes)
During Andy Davidson and Gwen's first year as partners, they had to deal with a man trying to get on a bus to Carmarthen naked. Gwen asked the man why he wanted to go to Carmarthen. (AUDIO: Herald of the Dawn)