On January 30, 1950, Mutual Broadcasting System launched a radio adaptation, Mark Trail, featuring Matt Crowley in the title role. The 30-minute episodes aired three times weekly, and 174 episodes were produced, running until June 8, 1951. A second radio series, starring Staats Cotsworth, was broadcast on ABC beginning September 18, 1950, with 51 half-hour shows that ran thrice weekly until January, 1952. The series then switched to a 15-minute format, producing 125 episodes that aired weekdays through June 27, 1952. Only a handful of the 15-minute episodes are known to have survived.
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