The first audio play series about Mark Trail aired on January 30, 1950 and lasted until June 8, 1951. It was broadcast on Mutual Broadcasting System . Each episode was 30 minutes long and aired three times a week, at 5 p.m. on Monday, Wednesday and Friday. [1] The series was sponsored by Kellogg's Pep cereal. A review of the first episode in the trade publication Variety said that the show's hero "combines the character of J. Edgar Hoover and Robin Hood." It commended Matt Crowley's performance in the title role.
