Aubrey's dad resurfaces and immediately presents a moral dilemma for him. Meanwhile, the murder of someone from Booth and Brennan's past is investigated.
The death of a marine sargeant is treated as suicide but the team suspects otherwise. Torres starts looking for apartments close to work as he adjusts to his new role.
Hodiak takes matters into his own hands and lands on the doorstep of an enigmatic serial killer. Elsewhere, Manson enlists Bobby, Mary and Sadie to retrieve money from Gary Hinman.
Dean calls a demon to make a deal to save a man named Evan Hudson, in exchange for himself. While making the deal, the demon confronts Dean’s worst nightmare about their dad.