Neal and Peter must go undercover into the world of corporate espionage after a tech company’s head researcher is murdered.

An FBI Agent is accused of selling witness locations during criminal trials, and the U.S. Marshals ask Peter and Neal for help.

Love is in the air as Carter gets fed up with Grant’s pursuit of Allison, Zoe conceals her love and Henry courts Grace. But all the emotions may have to be put on simmer when people in town start turning to stone.

Claudia has just been given her first assignment, but when it involves a real human torch and H.G. Wells could it be too much for her to handle? Not to mention an appearance by an old love of Artie’s

Cal and Zoe attend the execution of a man they helped put on death row. Moments before dying, the murderer claims to be innocent… and Cal believes him. Racked with guilt that he might have sent an innocent man to his death, Cal defies orders from the FBI to stay out of it and goes in search of answers.

Carter’s camping trip with Kevin becomes a little scarier than ghost stories by the camp fire when a malfunction with the AI at Global Dynamics may turn some of them deadly. Elsewhere, Henry thinks about telling Grace the truth.

Mrs. Frederick secretly recruits Pete to find a mole within the organization who is buying artifacts. However, when the mole finds out, they go after those closest to Pete.

A strange clue in an empty room, a blood-soaked car, a priceless Old Master, a deranged bomber. With the clock ticking, the curtain rises on a battle of wits between Sherlock, John and the shadowy stranger who seems to know all the answers…