Creator
Chris Claremont, Marc Silvestri
Ann Nocenti, Arthur Adams, Carl Potts
Base
Xavier Institute, Salem Center, Westchester County, New York
X-Factor Investigations Headquarters, New York City, New York; formerly Detroit, Michigan; mobile; Xaviers School for Gifted Youngsters, Salem Center, Westchester County, New York; Mojoverse; Cootermans Creek, Australian Outback, Australia; Alcatraz I