Candid Microphone went on air for the very first time on ABC radio. It was created by Allen Funt, who used a hidden microphone to set up funny and unusual situations for random people.
Candid Microphone was a practical joke radio series created by Allen Funt. It aired every Saturday night on ABC (and later on CBS every Tuesday). The show was the radio precursor of the popular TV hidden camera reality series entitled "Candid Camera," which aired until May 5, 2004.
In Candid Microphone, microphones were hidden and meant to catch people's reactions to some surprising situations.