It’s a love story. Beyond the captivating medical and family drama and entertainingly callous mob dealings, ‘The Mob Doctor’ deftly weaves romance into its medical and crime tapestry. Constantine loves not only Grace as a daughter, but has a complicated history with her mother (Wendy Makkena) and her father’s mysterious death. Meanwhile, Grace is dating the upstanding Dr. Brett Robinson (Zach Gilford) even though she maintains a prickly friendship with first love and Constantine flunky, Franco (the dreamy-eyed James Carpinello). This love trapezoid provides a sexy foil to all of the double-crossing and backstabbing, and more than that, it gives a reason for most of it.