The premise (from "Lone Star" creator Kyle Killen) is admittedly a little tricky: Isaacs plays Detective Michael Britten, who, after suffering a horrific car crash with his wife (Laura Allen) and teen son (Dylan Minnette), finds himself living in two separate realities. In one, his wife survived the crash and his son did not. But when he goes to sleep, he wakes up in a world in which his son survived the crash, but his wife didn't. On the job, Michael has different partners ("That '70s Show's" Wilmer Valderrama and "The Practice's" Steve Harris) and works on different cases in the two realities -- but details from one world are starting to bleed over into the other. Which reality is real? Or is all of this in Michael's mind?