Team Scorpion heads to Cuba when a woman from Cabe’s past pleads for him to help catch a Serbian war criminal.

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.

Walter, Cabe and Happy are trapped with the crew in a top secret submarine when an explosion sends it to the bottom of the ocean with limited oxygen and a self-destruct function that will soon activate.

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 must stop a sabotaged runaway subway train with Paige and Ralph on board. Also, in his attempt to impress Happy, Toby has his first boxing match.

Team Scorpion is blackmailed to break into the United Nations to assist in the assassination of a menacing arms dealer. Also, Sylvester makes a bold move to protect Megan's wishes.

Team Scorpion goes undercover at a university to find a hacker who infiltrates the Federal Reserve and threatens to collapse the world economy.

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.

Team Scorpion help Toby and Happy race to the altar to say “I Do” after a simple job extinguishing a tunnel fire becomes catastrophic.

While attending a tech convention, Team Scorpion is taken hostage by a group attempting a virtual heist.

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.