The team searches for a boy from Ralph's class who encountered a deadly criminal after going missing from a field trip. Meanwhile, Toby gets closer to uncovering the identity of Happy's husband.
Walter's accidentally launched into space, where he hallucinates about Paige as his oxygen runs low. Meanwhile, the team rush to return him to Earth before he suffocates.
In the second-season finale, a mentally unstable ex-member of Scorpion kidnaps Toby and threatens to kill him unless the team meets his demands.
The Department of Defense hires the team to break into Fort Knox and steal an artifact in order to test their security system, but they must force entry once again when they discover something dangerous hidden inside the object.moreless
The team's mission to recover the remains of marines in Vietnam is compromised when they find themselves in the path of a dangerous tornado.
After Los Angeles' blood supply gets hacked and is deemed unusable, the team must find the perpetrator in order to save the life of a young girl in need of a heart transplant.moreless
Sylvester competes on "The Price is Right". Later, the team must infiltrate a high-end car-smuggling operation that's preparing to ship bioweapons to South America.
Team Scorpion must stop an influx of drugs that are being smuggled into the country by drones. Meanwhile, Walter gives Happy and Toby an ultimatum on their new relationship.
The team must fix a pinched gas line in order to prevent a massive explosion after a powerful earthquake hits Los Angeles.
The team is tasked with helping NASA's top-secret rocket launch, but they are forced to sabotage their own mission when Walter's date from the previous night has a bomb strapped to her chest.moreless
Sylvester's estranged father, a retired general, enlists the team's help after discovering that an African dictator has uncovered a deadly weapon of mass destruction from World War II and intends to use it.moreless
The team must brave the cold in Antarctica in order to save a U.S. Special Forces unit. Meanwhile, Toby risks his life to find Happy after she gets cut off from the team and lost in a blizzard.moreless
Team Scorpion goes undercover at a university in order to find a hacker who infiltrates the Federal Reserve and threatens to collapse the global economy.
Team Scorpion and Walter's parents visit Megan in the hospital as her health deteriorates, but they end up quarantined when a deadly fungus outbreak threatens to infect everyone.
The team is blackmailed to break into the United Nations to assist in the assassination of a dangerous arms dealer; and Sylvester makes a bold move to protect Megan's wishes.
Team Scorpion helps the CIA locate a top-secret aircraft in Area 51 in order to raise money for Walter's research to save his sister's life.
The team must stop a runaway train with Paige and Ralph aboard. Meanwhile, Toby competes in his first boxing match in an attempt to impress Happy.
A nefarious virus is uploaded to Walter's computer that turns the team's new "smart" building project into a burning death trap with people locked inside.
The team goes undercover on the set of a superhero movie in Kazakhstan to dismantle a nuclear missile being sold by terrorists.
Walter, Cabe and Happy become trapped in a top-secret submarine with a limited oxygen supply and the potential to self-destruct after an explosion propels it to the bottom of the ocean.
Sylvester goes undercover in a federal prison in order to save the lives of three judges, but the team must help him escape when his life is threatened.
The team travels to Cuba to catch a Serbian war criminal after a woman from Cabe's past pleads for his help; Alana De La Garza returns as the new head of Homeland Security; and Walter meets a new friend while completing court-mandated community service.moreless
In the second season premiere, a nuclear-powered Russian satellite is knocked out of orbit and the team reunites to divert its course before it detonates over Southern California. Meanwhile, it is revealed that Paige kissed Walter, which forces them to confront their feelings for each other. Gene Simmons makes a guest appearance as himself.moreless
In the season finale, the team, although torn apart and uncertain as to their future, must come together to save Walter's life as his car hangs off the side of a cliff.
Walter learns Cabe's long-hidden secret regarding the Baghdad mission and it threatens to tear Team Scorpion apart. Meanwhile, Ralph puts his life in danger to help the team.