The Mob Doctor

Season 1, Episode 11: Sibling Rivalry

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When a champagne bomb is delivered to Constantine, he and Celeste (Jennifer Beals) go on high alert to determine who wants him dead. Meanwhile, Nate turns to Grace after he accidentally jeopardizes a mobster's valuable racehorse. Back at Roosevelt Medical Center, Grace is tapped to treat Brett's estranged brother, Jack Hanson (Derrick Trumbly), following a severe cycling accident.