Kidnapped

The teenage son of a wealthy New York City family is kidnapped, unleashing an elaborate game between the kidnappers, the FBI and the family's private investigator.

With few clues as to Leo's whereabouts, Knapp and King are forced to redirect their investigation to find the Cains' missing daughter, Aubrey.

With he and Ellie determined to forge ahead with a gala party at their home, Conrad suspects a childhood friend-turned-mob boss in Leo's kidnapping.

As Schroder looks to silence anyone connected to Leo's kidnapping, a reporter stumbles onto the Cains' secret.

Ellie's wealthy father uses his considerable influence to take control of the investigation into Leo's kidnapping.

As an unscrupulous newspaper reporter goes public with the news of Leo's kidnapping, Knapp looks to connect an imprisoned murderer and the Cains, while King's conduct is scrutinized by the Bureau.

Worried that someone may be trying to frame him for Leo's kidnapping, Virgil puts himself and Ellie in the line of fire in order to lay a trap for the crime's assassin.

After capturing the Accountant, Knapp ends up a prisoner of another of the kidnapping's hit men.

Knapp's efforts to interrogate one of the kidnapping masterminds lands King and his daughter in a potentially deadly trap.

As Knapp and Conrad uncover Prince's role in the kidnapping, the conspiracy begins unraveling over money.

The leads in the case bring Conrad, Knapp, and King to Mexico in their search for Leo.

Leo's safe return home is upended by the realization that the kidnapping's real mastermind was an FBI agent who was out to get revenge for the death of his own son.