I've recently been catching up on ALIAS. This was one of those shows that several of my friends watched but I was so far behind I didn't want to jump in mid-series. Since opening a Netflix account, I have been watching and I am now up to Season 4.
I can't believe I never watched this show when it originally aired a few years ago. Like LOST, it was created by J.J. Abrams. I am convinced that everything J.J. puts his name on is automatically awesome (well, except Cloverfield - that was a turd!). Also like LOST, each episode has a pretty cool cliffhanger ending.
If you have some time to kill and need a television fix, I highly recommend ALIAS. You won't be sorry.