Chess.

I'm no chess player but I love watching the best players of the world Sergey Karjakin and Magnus Carlsen playing in New York.
The Norwegian broadcasting have wonderful people in their studio. Most often two or three chess players and one or two novices. As Norwegian broadcasting is famous for their slow tv this is a wonderful example of slow tv.
I must admit I'm a bit embarrassed thinking about the amount of time I have spent watching chess. But I can guarantee you it's fantastic entertainment. It's great, slow TV.