Captain Britain and MI13 is an American comic book series published by Marvel Comics and written by Paul Cornell, with art by Leonard Kirk. The series centers on the fictional British government agency MI: 13, which is dedicated to protecting the United Kingdom from supernatural threats. The main strikeforce is led by the superhero Captain Britain, and consists of various Marvel Comics characters that are of British descent or have a connection to the country. The series launched as a tie-in to the Secret Invasion event in May 2008 and ceased publication with issue #15.

Paul Douglas Cornell is a British writer best known for his work in television drama as well as Doctor Who fiction, and as the creator of one of the Doctor's spin-off companions, Bernice Summerfield.