Against Cabe's advice, Team Scorpion heads to Las Vegas for a simple casino job, but a robbery leads to Walter's arrest and the rest of the team is left to clear his name.

When Sylvester accidentally triggers an explosive device during an investigation, Team Scorpion must focus on finding who's responsible even while their friend's life hangs in the balance.

Team Scorpion goes undercover on a cruise ship to locate and disable deadly stolen rockets. Meanwhile, as Valentine's Day approaches, Toby and Happy help Ralph, who is in the throes of his first crush.

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.

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.

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.