lol you live in the States so I already know that you can't know unless a Brit told you, and even then I don't think they're at the end of the season yet
It's nothing like Lost. This cop, Sam Tyler, is driving along in 2006, and the next thing he knows, he's in 1973... no explanation, and the best thing you can guess is that he's a coma victim and it's all just a very realistic nightmare. The show is brilliant, very well written and John Simm is a great actor. At first it sounded a bit cheesy, but after watching it and realizing it wasn't all a bunch of sequentially corny 70's jokes, and that it was actually well-written and stuff, I got into it, and now I'm hooked. Great show, if you get the BBC where you live you should give it a go. This sunday they're airing the first four episodes.
Edit: Part of the reason why I'm falling in love with this show is that it reminds me of the show "John Doe," which was canceled by faux... err... "Fox"... a few years ago (even though it had the strongest first-season ratings of any drama they'd ever aired... morons). In that show, John Doe is a man who knows EVERYTHING (I mean literally everything ever documented in history, for instance, he can recite DOS in binary and tell you to the millimeter the tallest mountain in the world). But he doesn't know who he is or where he came from, and he can only see in black and white, and it all happens as a result of his amnesia. The lead character of that show, Dominic Purcell, is in some new show called "Prisonbreak," also on Fox (I think)... I pretty much stopped watching fox when they canceled that though.
"In an interstellar burst, I'm back to save the universe"