Abbott and Costello Radio Show was a popular comedy program that aired on American radio from 1942 to 1949. The show featured the comedic duo Bud Abbott and Lou Costello, known for their slapstick humor and witty banter. Each episode of the show followed a recurring format, with Abbott and Costello getting into various misadventures and comedic misunderstandings. The program's success led to the duo's rise to fame and eventual transition to television and film. Abbott and Costello's radio show is remembered for its timeless comedy sketches, including their famous "Who's on First?" routine, which remains one of the most iconic comedy routines of all time.