Walter and Sylvester go undercover as competitors at an international-chess competition in order to extricate a U.S. spy from a foreign country before her identity is exposed.
Team Scorpion's latest job to find sunken treasure goes amiss when Walter and Paige's boat explodes, leaving them stranded in the Pacific Ocean surrounded by sharks.
The team must rescue a man teetering on the edge of a massive sinkhole that threatens to destroy Los Angeles' water supply.
The team is tricked into producing counterfeit money for a foreign entity that's seeking to run the U.S. economy, leading Paige to turn to her mother's grifting skills to bail them out.
The team must freeze Cabe's body in order to save his life after he's seriously wounded by exploding shrapnel while on a mission in the desert.
The team's electronics-free getaway in the mountains on Christmas Eve takes a dangerous turn when they encounter a group of gunrunners who kidnap Ralph. Meanwhile, Tim makes an important decision about his role with Team Scorpion.moreless
Walter's forced to swim through the deadly La Brea Tar Pits in order to save a woman who's trapped in the tar before she runs out of oxygen. Elsewhere, Veronica helps Ralph with his troop's cookie sale, unbeknownst to Paige.moreless
Paige's estranged mother enlists the team's help when she accidentally uncovers a forgotten nuclear reactor that's on the verge of exploding.