Jordana Spiro and Zach Gilford Jordana Spiro and Zach Gilford

In the premiere episode of The Mob Doctor, viewers learned that the first corpse Dr. Grace Devlin (Jordana Spiro) ever encountered was that of her father when she was a young girl — and now it seems that the identity of his killer will be one of the show's major mysteries. Not to mention, just how deep did his Mafia ties run?

Mafia Medicine: Jordana Spiro, Josh Berman weigh in on The Mob Doctor

In our exclusive clip from the show's second episode, titled "Family Secrets," Grace conducts an MRI on one of her "off-book" patients (aka offering her medical services to the Chicago Mafia in order to pay off her family's debt to them). This time, Grace is tending to Donte Amato, the former rival of recently-slain Mob boss Moretti — and she soon learns that he may have an unexpected connection to her father, as well as information about his murder.

"Do you know who did it?" Grace asks him.

Something tells us the answer is yes. Check out the clip below.

The Mob Doctor airs Monday at 9/8c on Fox. Those who missed the premiere can catch it for free on iTunes, Hulu and Fox OnDemand.