Boxcars711 Saturday Matinee One - The Molle Mystery Theater "Betrayer" (4-02-48)

Although Molle Mystery Theatre was initially sponsored by Molle Shaving Cream, other sponsors (such as Bayer Aspirin, Ironized Yeast, Phillips Milk of Magnesia) also sponsored the program. Sometimes, when it was not sponsored by Molle, the program was called "Mystery Theater". The show was first heard on NBC, on 9/7/43. Time slot was originally Sunday nights at 9:00 PM, but was later moved to Tuesday at 9:00 PM, and Friday at 10:00 PM. In 1948, the show moved to CBS (Tues, 8:00 PM), and in 1951, it moved to ABC, where it was called "Mark Sabre", and heard on Wednesdays at either 8:00 PM or 9:30 PM.