Team Scorpion is tasked with ensuring the fairness of the United States presidential election after an attempt is made to rig the voting process.

When Team Scorpion goes to Ireland to honor Megan's memory on the one-year anniversary of her death, Walter finds a local village is in grave danger.

Team Scorpion is tasked with helping Paige's estranged mother after she unintentionally discovers a forgotten nuclear reactor is about to explode.

A woman becomes stuck inside the deadly La Brea Tar Pits, and Walter is tasked with swimming through the tar to save her before she runs out of oxygen.

Team Scorpion encounters gun-runners while on a mountain getaway sans electronics for Christmas Eve, and they must save Ralph after he is kidnapped.

While on a mission in the desert, Scorpion encounters exploding shrapnel that severely wounds Cabe, causing the team to try to discover how to freeze his body.

As Reid finds himself in a problematic situation, he is forced to confront an old nemesis; Derek Morgan offers a lead that could help locate Mr. Scratch.

A new member joins the ranks of the Behavioral Analysis Unit team as they attempt to bring down Mr. Scratch while rescuing one of their own.

The Behavioral Analysis Unit goes out to investigate three very similar crimes that include the victims' remains being found in old suitcases.

The Behavioral Analysis Unit is sent to investigate a state-of-the-art drone that began shooting up a workplace in California's Silicon Valley.

A group of successful businessmen from Detroit find themselves being chosen as targets in a malicious, power-assertive unknown subject's plans.

The Behavioral Analysis Unit is sent out to investigate when multiple women disappear in Virginia, but they are unsure of any commonalities between the victims.

When Garcia suffers from anxiety caused by a case with personal ties to her past, Morgan decides to come visit her and offer his emotional support.

The Behavior Analysis Unit is dispatched to Austin, Texas, in order to investigate an unsub who has been choosing prominent community members as their target.

The New Orleans team sets out to save Sebastian after he is captured and forced to use his gaming expertise to break prisoners out of jail.

The NCIS and the FBI launch a joint investigation after three sailors are killed in a private plane crash in the bayou; Sonja and Lasalle hold interviews.

When a Navy Seal candidate is killed prior to completing his training, the NCIS team investigates an unconventional instructor's training strategies.

The New Orleans team investigates the death of a sailor who was found murdered at a disorderly motorcycle rally; Lasalle seeks Gregorio's advice.