Copyright 1941 by Comic Magazines, Inc.
Writer credit revised from Joe Devlin to ? by Craig Delich 2013-4-6. Devlin did not write this strip according to the Who's Who. Artist correction from Joe (who did not exist) to John Devlin also made by Craig Delich.
Last appearance. There is a blurb at the end of the story that there will be more Madam Fatal next issue, but there wasn't.
Pinajian writer credit removed by Craig Delich 2013-6-14. The Who's Who does not indicate that Pinajian wrote this feature. The fact that Pinajian served in the military makes it possible that the strip ended because of his entry into the service.