Pocket universe

Pocket universes were functionally discrete continua which nevertheless constituted a subset of a larger universe. They were usually artificial in origin, created by powerful beings.

Possible Pocket Universes

 * Anti-matter universe (DW: The Three Doctors)
 * Celestial Toyroom (DW: The Celestial Toymaker)
 * Land of Fiction (DW: The Mind Robber)
 * Eugene's World (BFA: The Holy Terror)
 * Bubble universe (DW: The Doctor's Wife)