It was previously known on the radio. Its name: Candid Microphone.
For a short time it was a feature on The Garry Moore Show.
"Candid Camera" was first telecast on ABC-television in 1948 (as "Candid Microphone"); moved to NBC in 1949; on CBS from 1949 to 1950; again on ABC from 1951 to 1952; again on NBC in 1953; in syndication from 1954 thru 1957; returns to NBC in 1958 as a regular segment of Jack Paar's "The Tonight Show"; reappears in 1959 on CBS as a weekly feature on "The Garry Moore Show", before once again becoming a standalone show on CBS from 1960 to 1967; again on ABC briefly in 1974; in syndication (as "The New Candid Camera") from 1974 to 1979; briefly back to NBC in 1983; back to CBS (as "The Candid Camera Show") for the 1987-1988 season; in syndication (as "The All-New Candid Camera") 1991-92 ; and one last run on CBS from 1996-2001.