Torchwood Four

Torchwood 4 was a branch of the Torchwood Institute. The nature of this branch and its personnel where unknown. The Torchwood Archives tell of Torchwood 4 being under a golf course in Inverness. According to information passed from Torchwood 3 operative Jack Harkness to new recruit Gwen Cooper, Torchwood 4 he told her it was lost, though there was hope it would be found one day. (TW: Everything Changes)

Fan Films[1]have suggested that other Torchwood bases exist in one or more of the Commonwealth countries, citing Toronto's CN Tower as the base for Torchwood 4. Due to the nature of the CN Tower's architecture, Torchwood 4 would most likely be located underneath the tower, as the tower itself has limited capacity.