Jordana Spiro Jordana Spiro

The Mob Doctor's Grace Devlin (Jordana Spiro) is no stranger to morally ambiguous situations, and Monday's episode — marking the show's return after an extended hiatus due to Fox's coverage of the baseball playoffs — is no exception. But this week's case might be Grace's toughest dilemma yet.

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Grace treats a young female patient in desperate need of a heart transplant and, after one donor falls through, Grace learns that the girl's only hope is her estranged father. The only problem? The father, who Grace discovers is a former associate of mob boss Constantine Alexander (William Forsythe), is very much alive — and wants Grace to kill him so that he can donate his heart to save his daughter.

What will she do? Watch an exclusive clip from the episode below and tune in Monday at 9/8c to find out.