"Life on Mars"
How do you make a spinoff of a show that, up to the very end, appeared as though it was taking place mostly in the main character's head? By having a new character (Keeley Hawes) try to figure out what happened to Sam Tyler, and revealing that what appeared to be all in Sam's head may not have been that way after all. That, and another healthy dose of breakout character Gene Hunt (Philip Glenister).
-- Rick Porter, Zap2it