Now I will warn you the show is both Sci-fi and British (it's a spin-off of the long running, extremely popular British show Dr. Who), so if those two things aren't your cup of tea Torchwood might not be for you. But unlike your standard variety science fiction show, Torchwood is very hip and mystery oriented. The American show Torchwood draws the greatest comparison to is The X-Files and I think that's pretty accurate. But I will say I never got into The X-Files and I love Torchwood.
I recommend searching your cable box for BBC America (its usually a pretty high number) and try catching the show in reruns. If you like it, Season 1 has just been released on DVD so you still have plenty of time to catch up with Captain Jack Harkness and the Torchwood crew's adventures before the start of Season 2. Plus, for all you Buffy the Vampire Slayer fans out there, James Marsters will be guest staring on Torchwood this season. If you'd like a sneak peek of the upcoming season, and for a brief Marsters cameo, check out the Torchwood Season 2 trailer below: