To fix a Los Angeles nuclear reactor that's on the verge of a cataclysmic meltdown, Walter and the team must reluctantly enlist the help of a troubled former member.

Team Scorpion try to protect Cabe's ex-wife, after she uncovers evidence that suggests foul play in the death of a prominent congressman.

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.

While on a mission to save lost hikers, Team Scorpion’s helicopter crashes, igniting a massive wildfire that quickly closes in on them. Also, Sylvester must help their injured pilot who is unable to make it to safer ground.

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 goes undercover on the “Super Fun Guy” movie set in Kazakhstan in order to disable a soviet era nuclear missile being sold by terrorists.

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

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.

When Team Scorpion and Walter's parents visit Megan in the hospital as her health deteriorates, they are quarantined after a deadly fungus outbreak threatens to infect everyone.

The members of Team Scorpion brave subzero temperatures in Antarctica to save a United States Special Forces unit. Toby risks his life to save Happy.

Sylvester comes face to face with his estranged father, a retired general, who asks Team Scorpion for help when he believes that a dictator in Africa has uncovered a deadly World War II-era weapon of mass destruction and intends to use it.

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.

While on a secret mission in Djibouti, Africa, with his new Homeland protégé, Tim Armstrong, Cabe is captured and Team Scorpion must save him.

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.

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.

Following a severe storm, Happy’s friend Ada, 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.

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.