From Wikipedia:
To Tell the Truth is an American television game show created by Bob Stewart and produced by Goodson-Todman Productions that has aired intermittently in various forms since 1956 on both networks and in syndication. Along with The Price Is Right, it is one of two game shows in the United States to have aired at least one version in every decade since the 1950s, however no revivals are planned, meaning that the show will soon lose this title. A total of 25 seasons of the various versions of To Tell The Truth have been produced, just exceeding the 24 of What's My Line? and the 20 of I've Got a Secret.
The show challenged a panel of four celebrities to correctly identify a described contestant who typically had an unusual occupation or experience. This "central character" was joined by two "imposters" who pretended to be that central character. The celebrity panelists questioned the team of challengers, with the imposters allowed to lie, but the central character "sworn to tell the truth".
Created by
Bob Stewart for Mark Goodson-Bill Todman Productions
Presented by
Bud Collyer (1956-1968)
Garry Moore (1969-1977)
Joe Garagiola (1977-1978)
Robin Ward (1980-1981)
Gordon Elliott (1990)
Lynn Swann (1990-1991)
Alex Trebek (1991)
John O'Hurley (2000-2002)
Narrated by
Bern Bennett (1956-1960)
Johnny Olson (1960-1972)
Bill Wendell (1972-1977)
Alan Kalter (1977-1981)
Burton Richardson (1990-1991, 2000-2002)
Charlie O'Donnell (1990-1991, substitute)
Production
Running time 30 minutes with commercials
Production company(s)
Goodson-Todman Productions (1956-1981)
Mark Goodson Productions (1990-2002)
Broadcast
Original channel CBS (1956-1968)
NBC (1990-1991)
Syndicated (1969-1978, 1980-1981, 2000-2002)
Original run December 18, 1956 – March 15, 2002