Captain Britain and MI13 is an American comic book Marvel Comics series 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 (Brian Braddock), 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.