I was a bit taken aback by the lighter, almost cartoon-ish opening touch - not exactly what you would expect from a Shawn Ryan show - but everything grew on me as it went along. The (blitzkrieg-characterization) mini-monologue voice-overs were brilliantly used, especially in Antonio's case, coming as it did with its punctuation being the shooting - perfectly timed, as it demonstrated just how much of an impact his death would be on Teresa. The ending didn't hit anywhere near as hard as The Shield's pilot, but it was still impressive.
Teresa and Jarek are perfect in their roles and compliment each other well. The Big Bad didn't disappoint, either: not just smart and uncomplacent, the alderman was suitably freakish with that celebratory ear-tonguing in the shooting aftermath. There's a lot of potential in the Undercover Liam sub-plot - and he certainly kept his cool at the right times in this episode.
The young, new partner figuring out that Liam wasn't quite right so quickly was a bit contrived, but, worse, the Wysocki niece and her partner/lover thing felt like a big upcoming distraction from the central, more interesting plot concerns.
Cartoon-ish is probably the wrong word to describe this. Comic book-ish might. It feels like a smarter, tougher, harsher, more serialized version of - to use a network TV comparison - something in the vein of fellow cop show, Castle. Which isn't bad, just different than what you would expect from a Shawn Ryan show. Although different is what he's likely hoping for as far as ratings go.
P.S. Jennifer Beals is 47?! Her husband must have made a deal with the Devil.