The new Homeland Security director Adriana Molina reinstates the team to prevent a nuclear, out of control Russian spy satellite crashing on California. Everyone enjoys returning, but Walter isn't only handicapped by a manual prosthesis but also hides his third-disabling mental condition except for Paige, who dares not respond when he finally admits loving her. The mission keeps going wrong for those and external reasons, yet Walter pulls it off. Written by KGF Vissers

Gabe and Walter lead the team to Cuba to abduct and arrest Serbian war criminal in hiding Zoric, to be identified by victim's daughter Sonia Balasevic, to get hold of a top-secret list. However Sonia is too vindictive and the Cubans get on to them, so reaching the escape plane looks near hopeless. Yet they persevere to steal the list from a bank vault. Written by KGF Vissers

To prevent the murders of three unidentified federal judges, the coded instructions must be intercepted and deciphered at the prison where a major gang's boss is held. The warden reluctantly accepts and tries to 'protect' even less enthusiastic Silvester, whose only communication means gets busted while challenging the biggest goon to get into the infirmary. Written by KGF Vissers

The Navy enlists three members of Scorpion on a classified mission in a top-secret submarine 300-feet below the surface. When the crew discover Walter, Happy, and Cabe using comms to communicate with the rest of their team back in the garage, they confiscate and destroy them. But an explosion sends the sub, and everyone on board, to the bottom of the ocean floor with limited oxygen and without any way to get help or notify anyone where they are. Written by Lisa B. Shaffer

The team goes undercover on the set of a superhero movie in Kazakhstan to dismantle a nuclear missile being sold by terrorists.

Walter's attempt to normalize goes horribly wrong when a nefarious virus is uploaded to his computer, turning Scorpion's new smart building project into a burning death trap with people locked inside.

The team tries to stop a runaway train that Paige and Ralph are on.

Megan's condition get's most worse. Walter starts to get frustrated about not being able to help her and in Walter's crazy quest for investors the CIA appears in the garage with the promise of a big payday.

The British secret service blackmails Homeland Security into fielding the Scorpion team, which will otherwise be set up as murders, into eliminating at any cost African dictatorship ambassador and arms dealer to Latin America revolutions Madaky at his UN General Assembly speech turn. Walters' team wrestles with morality and logistics, yet take so the daunting challenge, whichn seems to go all wrong, buts ends in multiple twists. Meanwhile Walter gets a court order to prevent Megan being euthanized, but lover Sylvester keeps his promise to end her suffering. Written by KGF Vissers

As Megan's condition worsens, the team gathers at the hospital. As they arrive, they find a pathogen has infected the hospital threatening all of their lives.

The Scorpion team goes under cover at a college to discover who is holding the federal reserve for ransom. Walter tries to help Ray, while Paige is trying to get Walter to express grief about Megan.

At Christmas Eve, the team is called to prevent a temporarily unmanned power dam cracking due to excessive rainfall and flooding an unsuspecting town in the valley. They soon realize software can't pull this off, physical repairs are required in a race against rainy time. Walter's solution even requires an urgent, massive voluntary power cut. Written by KGF Vissers

In order to save a United States Special Forces unit from certain death, Team Scorpion must brave the subzero temperatures of Antarctica. Also, when Happy becomes cut off from the team and lost in a blizzard, Toby risks his life to find her.

After a failed session of speed dating, the Scorpion team is off to Africa to investigate a country's attempt to develop weapons of mass destruction. Slyvester is most uncomfortable on the mission as his father is working with the team as a consultant. Written by shamrock72

Walter tried speed dating and now has a follow-up dinner date with Linda, who only comes to his place calling for help having been fitted with a bomb. Meanwhile Cabe mobilizes the rest of the team to check out a NASA launch facility where former Homeland director Merrick reported anonymous sabotage blackmail concerning a secret military project, but that isn't what it seems and even ties into Walter's peril. Written by KGF Vissers

As expected by Sly, LA shivers from a minor earthquake. Still he volunteers to chaperon Ralph on a 'scientific observation' class activity to the coast, despite his own aqua-phobia and soldiers on inspired by fearless Ralph, rescuing a pregnant couple despite his glasses getting broken. Walter reluctantly started 'couple' therapy from near-quack Dr. Cecil P. Rizzuto with Toby, who refuses to explain why he's acting to indignant. They must rush off together to prevent the major gas-pipe exploding somewhere under Koreatown. Cabe and the girls are pined down, rescuing the people in a car about to be electrocuted in water. Written by KGF Vissers

Dubious psychologist Dr. Cecil P. Rizzuto's 'couple therapy' helps Walter discover Toby's infatuation for Hpapy, so the team boss sets the lovers a priorities ultimatum. The team is hired to help DEA Agent Sanchez, who lost his daughter to heroin, and a Mexican Federales Ministeriales elite team counter a drug cartel setting up a smuggle route by drone which might increase penetration from 15 to 100%. Sly built a device to sabotage the drones, but it doesn't work without him on site, ultimately leading to him, Happy and wounded Sanchez getting. Written by KGF Vissers

Sylvester wins 'The price is Right' his speedy way and devotes the winnings to research on late Megan's disease. *Cabe agrees to mobilize the team when his ex-con civil informer and dodgy protege Mick reports the government of (ficticous) Balio in Central America is smuggling a weapon of mass destruction. They find a bio-weapon designed to kill only the influential Aztec minority. Mick's part however proves far from heroic, not even innocent. Written by KGF Vissers

When Walter checks in at hospital for a near-routine checkup, Toby corrects a wrong diagnosis an thus discovers a mysterious blood virus epidemic, but also that the entire L.A. blood supply is compromised. Someone hacked the computer network to change the bar coding, using a code that can't be cracked timely to prevent many life-saving operations having to be canceled, including young Olivia's heart transplantation. The team tracks down the culprits and his motive, desperate for clues to guess the code. Time having run out for Olivia, they go the extra miles by speeding car. Written by KGF Vissers

Scorpion is sent on a secret mission to Djibouti, Africa. Cabe is captured. The Team must save him. While Walter has suspicions about the purpose of the mission and concerns over Paige's interest in new Homeland protégé, Tim Armstrong.

Team Scorpion's mission to recover the remains of fallen Marines in Vietnam is threatened along with their lives when a deadly tornado heads directly towards them.

Team Scorpion is hired by the Department of Defense to break into Fort Knox and steal a precious artifact in order to test their security, but they must break in a second time when they find something dangerous hidden inside the object.

Engineer Oksana Nastrova gets the team to help determine the exact spot to place the mobile sarcophagus over the Chernobyl reactor before the poor quality Sovuet concrete casing breaks down. Toby remains at home with Ralphie to coordinate, having testified against the release from prison psychiatry of former team member Mark Collins, actually in vain. Attempts to assess the Ukrainian mess go bad as Oksana looses control of her airplane, with Sly aboard, and Walter of the police and bomb squad robot at the radioactive lava core. During a risky rescue, Fearless rescuer Walter gets trapped with Paige, needing a kiss of life, yet back home still lacks courage to ask her out rather then rival Tim. Written by KGF Vissers

The team races against time to stop an unstable ex-member of Scorpion, Mark Collins who kidnaps and threatens to kill Toby if his demands are not met.