The Adventures of Ellery Queen, which was aired for the first time by CBS, had an interesting twist towards the end of the program. The show was then stopped to allow a panel of experts to guess the solution of the night's mystery.
The show was a crime/detective series, which starred Hugh Marlowe as Ellery Queen, a character described as Sherlock Holmes and Dr. Watson rolled into one. Ellery Queen was a character created by cousins Fred Dannay and Manfred Lee.
Enjoy this 1947 broadcast of the series: