Season 4
Episode Guide
Extinction
S4
E1
Team Scorpion must work with their old nemesis Mark Collins in order to prevent the extinction of mankind. Also, Walter and Paige awkwardly navigate their new relationship. Josh Leonard guest stars.
More Extinction
S4
E2
Team Scorpion continues to work with their nemesis, Mark Collins, in order to prevent an extinction event that could end humanity.
Grow a Deer, A Female Deer
S4
E3
When poachers almost kill a pregnant endangered deer, Team Scorpion recreates the animal's womb to try to save it and its baby's life.
Nuke Kids on the Block
S4
E4
While decommissioning an old nuclear missile, a simple accident causes Team Scorpion to endure exposure to toxic vapor while trying to prevent the nuke from detonating.
Sci Hard
S4
E5
While attending a tech convention, Team Scorpion is taken hostage by a group attempting a virtual heist.
Queen Scary
S4
E6
At Halloween, Team Scorpion takes on a case to prove the existence of ghosts on the Queen Mary but find an all-too-real disaster when they locate a 'ghost ship' on a deadly collision course.
Go With the Flo(rence)
S4
E7
While tracking a device that can prevent a nuclear meltdown through the Los Angeles sewers, Walter learns the nuances of listening and not offering advice to Paige.
Faire is Foul
S4
E8
For Sylvester's birthday, Team Scorpion visits a renaissance festival, but the revelry is cut short when a group tries to rob a nearby police evidence locker.
It's Raining Men (Of War)
S4
E9
On Thanksgiving, Team Scorpion's new neighbor, Florence (guest star Tina Majorino), joins them at sea on a mission to destroy a floating island of trash, but her flawed contribution leaves her, Walter and Happy stranded on the quickly dissolving island.
Crime Every Mountain
S4
E10
As Cabe's trial looms over Team Scorpion, a simple case goes sideways when they help a father and his daughter whose plane crashes nearby.
Who Let the Dog Out ('Cause Now It's Stuck in a Cistern)
S4
E11
As Team Scorpion anxiously awaits the verdict of Cabe's trial which could send him to prison, they focus their nervous energy on trying to save a dog stuck in a cistern.
A Christmas Car-Roll
S4
E12
On Christmas Eve, when Walter chooses work over spending quality time with his friends, he falls down the stairs and hits his head, and as he lays unconscious, he enters a dream world where Team Scorpion never existed.
The Bunker Games
S4
E13
Team Scorpion must work with Toby's nemesis, Quincy Berkstead (Jeff Galfer), and his wife, Amy (Shantal VanSanten), Toby's ex-fiancée, when they are locked inside an artificially intelligent doomsday bunker that aims to kill them.
Lighthouse of the Rising Sun
S4
E14
A solar storm knocks out power in Los Angeles, and Team Scorpion must help a teen pilot and his girlfriend who are lost over the Pacific without navigation or radio contact.
Wave Goodbye
S4
E15
Team Scorpion must prevent an incoming tsunami from hitting a vulnerable nuclear power facility, and Toby secretly helps his ex-fiancée retrieve her stolen identity.
Nerd, Wind and Fire
S4
E16
On Valentine's Day, Team Scorpion must set aside their romantic plans to help a doctor and pilot trapped inside a helicopter that crashed atop a skyscraper.
Dumbster Fire
S4
E17
The geniuses of Team Scorpion turn into knuckleheads and Paige must simplify the science for them, when their mental faculties are impaired during a job to prevent the creation of a black hole.
Dork Day Afternoon
S4
E18
Team Scorpion inadvertently crashes a bank robbery in progress and is taken hostage.
Gator Done
S4
E19
Team Scorpion heads to the bayou to track down a cagey alligator in order to stop a deadly mosquito-borne virus, and Paige teaches Walter the concept of the 'white lie.'
Foul Balls
S4
E20
Team Scorpion must use their high IQs to win a softball game when the homeland director challenges, with all of their future government contracts on the line.
Kenny and the Jet
S4
E21
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.
A Lie in the Sand
S4
E22
Team Scorpion heads to Northeast Africa where they must carefully navigate a minefield in order to save the lives of local villagers.