I love it! It's one of the most intelligent things the BBC has done in recent years.
Is Sam Tyler a delusional 70's cop? Is he really in a coma and dreaming? Is there a sci-fi element we haven't seen yet?
The two series seems ideal, I don't like storylines dragged out (like Lost), but a series of the same characters (except Sam) picking up in 1981 is in the works apparently.