Robert Carlyle as the lead good guy/bad guy (who knows at this point) is, as always, wonderful. David Blue continues to be wonderful and adorable. Ming-Na (I've liked her since her days on As the World Turns) has a great steel to her in the role. As for newcomers, Elyse Levesque as Chloe and Brian J. Smith as Lt. Scott are great, and already are showing a really nice chemistry.
This one has some excellent potential.