Above us only sky...John Lennon

Sky at Night

This is the longest running television program on record. ©

In the US it might be: "The Open Mind is a half-hour public affairs interview show. First broadcast in May 1956 over WRCA television (now WNBC) in New York City, it currently originates from the studios of the CUNY Graduate Center and airs on public broadcasting stations nationwide." (Wikipedia)