The serial came to radio as a syndicated show on New York City's WOR on February 12, 1940. On Mutual, it was broadcast from August 31, 1942, to February 4, 1949, as a 15-minute serial, running three or, usually, five times a week. From February 7 to June 24, 1949, it ran as a thrice-weekly half-hour show. The series shifted to ABC Saturday evenings on October 29, 1949, and then returned to afternoons twice a week on June 5, 1950, continuing on ABC until March 1, 1951. In all, 2,088 original episodes of "The Adventures of Superman" aired on American radio.