The members of Team Scorpion must pass a mandated psych evaluation or face being disbanded after they're accused of destroying a priceless work of art in an attempt to protect an art exhibit. Paige enlists the help of the team when Ralph is reluctant to go to his school's Halloween party.

On Christmas Eve, Team Scorpion races to find a way to save a young boy's life after he is trapped in a beachside cave and the rising tide threatens to drown him.

Team Scorpion is tasked with uncovering a mole inside the CIA who is being coerced into stealing deadly chemicals. Paige gives Walter a flirting lesson in preparation for the case.

To protect a key witness who is en route to testifying against a deadly drug cartel, Team Scorpion takes her on the run, with the cartel hot on their heels.

Team Scorpion heads to Cuba when a woman from Cabe’s past pleads for him to help catch a Serbian war criminal.

Team Scorpion goes undercover at a university to find a hacker who infiltrates the Federal Reserve and threatens to collapse the world economy.

When Los Angeles’ blood supply is hacked and deemed unusable because of fear it’s been tainted, Team Scorpion must find the culprit in order to save a young girl in desperate need of a heart transplant.

Team Scorpion must find a boy from Ralph’s class who goes missing on a field trip after he accidentally has a run-in with a deadly criminal. Also, Toby gets closer to finding out the identity of Happy’s husband.

Team Scorpion must save a man teetering on the edge of a massive sink hole that threatens to destroy the Los Angeles water supply forever.

While attending a tech convention, Team Scorpion is taken hostage by a group attempting a virtual heist.

Team Scorpion must work with Toby’s nemesis, Quincy Berkstead, and his wife, Amy, Toby’s ex-fiancée, when they are locked inside an artificially intelligent doomsday bunker that aims to kill them. Also, Walter is distracted by his recent dream where he is married to Florence, not Paige.

Paige’s maternal side goes into high gear when Team Scorpion must save an unconscious, hypothermic boy stuck in the wheel well of their airborne airplane. Also, Walter’s white lie to Paige starts to take a toll on him, and Paige realizes something’s up.