My favorite two things to watch on TV are Human Weapon, staring Bill Duff and Jason Chambers, and Ultimate Fighting Championship. Human Weapon is a show where Jason and Bill travel around the world studying all of the various martial arts for a week at a time, and then create a one hour documentary covering the history, techniques and science behind the various styles.
Jason and Bill have traveled all over the world and studied everything from Muay Thai to Pankration, to Silat – plus about 13 other styles that you may or may not have ever heard of. The show is just plain bad ass, and luckily you can watch a lot of the clips over on the History Channel site.
Here is an overview video of the show:
Here is a little clip from the Ninja episode:
Here are a few minutes from the Muay Thai episode: