Time Team

I've gone through the twenty years at least twice, and always come back. The talented and interesting "regulars" are a main reason for the show's continued popularity. Literally, it is timeless--not depending on the current news, celebrities, or fashions. It is educational, and it also would appeal to fans of mystery stories, because each episode involves a mystery and you participate as clues are dug up. The regulars are probably good friends, and not just good actors. Finally, each episode is independent, so you don't have to watch them in order and if you miss one or more episodes, you don't need to catch up on the story. I'm a permanent fan.