Sleepwalker is a Marvel Comics character created by Bob Budiansky. He is named after his race, and is the star of a self-titled comic book which ran for 33 issues from June 1991 to February 1994, with one Holiday Special. All but two of the issues were written by Budiansky, with Tom Brevoort and Mike Kanterovich writing the Holiday Special and one fill-in issue. Dan Slott also contributed a humorous side story in issue #25.
Budiansky’s concept dates to the late 1970s; however, he originally called the character Alien until the Ridley Scott film of the same name was released, at which point he shelved the character.
A second Sleepwalker character was planned to receive a self-titled series by Robert Kirkman in 2004 but instead debuted in the 2004 Epic Anthology, which was canceled after one issue. The original Sleepwalker’s next appearance was in Marvel Team-Up #15 nearly a decade after his original cancellation.