Larceny on the Air is a Republic B-plus picture "drawn from today's headlines." In this instance, the news event pounced upon was the mid-1930s Federal crackdown on patent-medicine quacks. Robert Livingston stars as a doctor who takes to the radio airwaves to campaign against cure-all charlatans. Livingston's mission is compromised when he falls in love with Grace Bradley, daughter of the medicine-racket ringleader. Somehow Larceny on the Air found the time to accommodate a musical number, "Sittin' on the Moon" (from the 1936 Republic picture of the same name).