First there was RTN (Retro Tv Network), then Ch. 49 became This channel (that's the name This, as is this is my movie channel) that or this didn't last long. Now it's something called Tuff TV. Like RTN they show old TV shows and movies, plus Universal Wrestling from the 70's and stock car racing from the 70's.
I occasionally watch The Rifleman and Cisco Kid. But I most enjoy that jewel of show from the 60's I Spy, which features Robert Culp and Bill Cosby as secret agents working for the Pentagon. They travel the world as tennis pro Kelly Robinson and his trainer Alexander Scott.
This made Bill Cosby the first African American in a lead role in a network TV series. His race is never mentioned in any of the episodes and in fact he is brains of the duo. Culp's character is the typical spy stereotype of the 60's, he drinks smokes, and is a womanizer. Cosby's character on the other hand is Rhodes Scholar and shares none of his partner's vices.
The episodes were typically serious, except for the banter between the two leads. The show was actually shot in various locations around the world (Tokyo, Hong Kong, Barcelona, etc.) We watched it regularly when I was a kid and I'm glad to have found it again. I might even consider getting it on DVD, so I can see it with a decent picture.