In Comics
Detective Comics #359 (January, 1967)
New Mutants #25 (March, 1985)
Base
Gotham City, formerly Metropolis, Platinum Flats
formerly Ruth Aldines mind, Utopia, San Francisco Bay, California; Westcliffe, Colorado; "No-Time"; Moira MacTaggarts Mutant Research Center, Muir Island, off the coast of Scotland; Haifa; Paris, France