King's Cross was a vicinity in London most associated with the train station of the same name. In 1963, Operation Proteus had an entrance in King's Cross. (COMIC: Operation Proteus) At a point prior to 1967 while he was a Time Agent, Jack Harkness stored a C-Fish in a locker at King's Cross. (PROSE: Trace Memory) In 2002, Samantha Jones in her original timeline lived in a bedsit in King's Cross. (PROSE: Unnatural History)