Sherlock helps a math genius from his network of ‘Irregulars’ experts after he stumbles upon a body while participating in a math puzzle competition. Joan attempts to extend an olive…

Marius falls back in with a dangerous con woman named Lizzie. Julia, fired by Audrey, searches for new employment. Audrey and Otto scramble to save their business. Carly’s continued probing…

Marius returns to the farm in hopes of finding a deeper connection with the Bernhardt’s but his past soon catches up and tempts him back to the con life. Julia…

Cora’s fate is determined.

Cora finally remembers the night in question.

When Ambrose begins to waver, Cora convinces him to take a risk for the case.

After a body is discovered in the woods, the investigation into Cora’s past deepens.

With Ambrose’s help, Cora struggles to recover missing memories, which lead Ambrose to a new suspect.

Ambrose unearths a startling secret about Cora that changes the course of the investigation; Mason takes matters into his own hands.