What was the first network TV show? What year did it first air? Also, what is the oldest TV show that is still being aired and not in re-runs?
The first “network” connected stations in New York and Schenectady in 1940, but the war delayed things. The first regular network service begin in 1946, with stations in New York, Schenectady, and Philadelphia (this became the basis of the NBC TV network).
The first regularly scheduled series was called “Hour Glass,” that ran for ten months starting in May 1946. It was a variety show.
The oldest show being aired and not in reruns is “Meet the Press,” which started in 1947. If you mean a non-news program, then it’s “The Simpsons.” “Law and Order” is currently the longest running drama series.