Castor, Cambridgeshire

According to the Tenth Doctor, Castor was a place near Peterborough, located just off the A47. Martha Jones surmised that he was wondering whether the owner of the spaceship Castor had been born there. (PROSE: Wooden Heart)

Behind the scenes

 * The real world county of Castor - Cambridgeshire - was not stated in Wooden Heart. It is used here only for disambiguation purposes.