Episode 1 : Civil War
Team Scorpion must put aside their personal and romantic predicaments when anonymous hackers with unknown motives take control of U.S. military aircraft and warships and point weapons at American cities.
Episode 2 : More Civil War
Just as Team Scorpion makes headway against the hackers controlling U.S. naval destroyers, they learn that a U.S. nuclear submarine also has been hacked and has a missile about to launch.
Episode 3 : It Isn't the Fall That Kills You
When Walter is accidentally launched into space in a rocket, he hallucinates about Paige as his oxygen runs low, and Team Scorpion works feverishly to find a way to bring him home before he suffocates.
Episode 4 : Little Boy Lost
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.
Episode 5 : Plight At the Museum
Team Scorpion's simple job at the Los Angeles Natural History Museum turns deadly when they discover thieves robbing a rare gem exhibit in order to get materials needed to enrich a nuclear bomb.
Episode 6 : Bat Poop Crazy
Before Halloween, Team Scorpion must infiltrate a deep, vast cave system in order to prevent a bat population from destroying the North America ecosystem. Also, the team dons costumes to stage photos from Halloween's past for Walter's upcoming immigration inspection.
Episode 7 : We're Gonna Need a Bigger Vote
On Election Day, as democracy hangs in the balance, Team Scorpion is called on when someone tries to throw the U.S. presidential election into chaos.
Episode 8 : Sly and the Family Stone
When Team Scorpion travels to Ireland for Megan's one-year memorial, Walter discovers that a nearby lake's natural disaster has created a poisonous cloud that could kill everyone in the village. Also, Cabe and Toby try to alleviate the tension between Tim and Walter.
Episode 9 : Mother Load
Paige's estranged mother calls on Team Scorpion when she accidentally uncovers a forgotten nuclear reactor on the verge of exploding.
Episode 10 : This Is the Pits
Walter must swim through the deadly La Brea Tar Pits when Team Scorpion helps a woman trapped in the tar before she runs out of oxygen. Also, without Paige's knowledge, her mother, Veronica (guest star Lea Thompson), "helps" Ralph maximize his troop cookie sales.
Episode 11 : Wreck the Halls
It's Christmas Eve and Team Scorpion's electronics-free mountain getaway turns deadly when they come across gun-runners, and Ralph is kidnapped when they try to escape. Also, Tim makes an important decision about his position with Team Scorpion.
Episode 12 : Ice Ca-Cabes
When a mission in the desert results in exploding shrapnel that seriously wounds Cabe, Team Scorpion must freeze his body in order to save his life.
Episode 13 : Faux Money Maux Problems
When Team Scorpion is duped into producing counterfeit money for a foreign entity intent on ruining the U.S. economy, Paige must rely on her mother Veronica's (Lea Thompson) skills as a grifter to save them.
Episode 14 : The Hole Truth
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.
Episode 15 : Sharknerdo
Team Scorpion's job to find sunken treasure goes awry when Walter and Paige's boat explodes, leaving them lost in the middle of the Pacific Ocean surrounded by sharks.
Episode 16 : Keep It in Check, Mate
Walter and Sylvester enter an international chess competition under cover on foreign soil for Team Scorpion in order to extricate a U.S. spy before her identity is exposed.
Episode 17 : Dirty Seeds, Done Dirt Cheap
When a simple mission to protect a vital seed bank goes awry, Team Scorpion must save Happy, Sylvester and Cabe, who begin suffering from life-threatening, fear-based hallucinations.
Episode 18 : Don't Burst My Bubble
Following a severe storm, Happy's friend Ada (Mary Mouser), who lives in a sterile bubble to protect her compromised immune system, is left with dangerous debris on the verge of puncturing the structure. Now, Team Scorpion works to safely move Ada to a more secure location without risking her life.
Episode 19 : Monkey See, Monkey Poo
To stop a dangerous virus from spreading, Team Scorpion must locate a rare endangered monkey in the Amazon that has the antibody for the cure. Also, Toby and Happy see a counselor (guest star Penn Jillette returns) to prepare for matrimony.
Episode 20 : Broken Wind
While on a mission to repair a turbine at a wind farm, Team Scorpion must race to save Paige and Happy before the cable holding the gondola they are in snaps and sends them plummeting to the ground.
Episode 21 : Rock Block
Team Scorpion must defy the orders of a foreign government after they retrieve an asteroid from space containing DNA strands that could have deadly consequences once exposed.
Episode 22 : Strife On Mars
Team Scorpion gets trapped inside a failing and dangerous biodome designed for Mars while trying to extract a pair of scientists inside.
Episode 23 : Something Burrowed, Something Blew
Team Scorpion help Toby and Happy race to the altar to say "I Do" after a simple job extinguishing a tunnel fire becomes catastrophic.
Episode 24 : Maroon 8
While en route to Toby and Happy's honeymoon, Team Scorpion's plane crash lands on a remote deserted island, leaving them all with little hope for rescue.
Episode 25 : Scorp Family Robinson
Three weeks after they crash land on a deserted island, tensions run high for Team Scorpion when they must battle to overcome their relationship obstacles in order to be rescued.