Gizmodo:

Star Trek. It’s one of the most quintessential pieces of science-fiction television around. And there’s a whole damn lot of it, even if you cut it down to the current eight different shows in the franchise (there’s even more on the way!). Want to start, but need a little guidance? We’ve beamed up to help you.

Just for the fun of it (or if you’ve got a 14 year old home to entertain), this is not a bad list to go through.