Street & Smith entered into a new broadcasting agreement with Blue Coal in 1937, and that summer Gibson teamed with scriptwriter Edward Hale Bierstadt to develop the new series. "The Shadow" returned to network airwaves with the episode "The Death House Rescue" on September 26, 1937, over the Mutual Broadcasting System. Thus began the "official" radio drama, with 22-year-old Orson Welles starring as Lamont Cranston, a "wealthy young man about town." Once "The Shadow" joined Mutual as a half-hour series on Sunday evenings, the program was broadcast by Mutual until December 26, 1954.