Nikki Castillo

The team's job to locate some sunken treasure goes wrong when Paige and Walter's boat explodes, leaving them stranded in the Pacific Ocean with sharks.

The team are exposed to toxic vapour after trying to decommission an old nuclear missile. Meanwhile, Paige confronts Happy about her third wheeling.

The team meets their new, disgruntled neighbour; a device that could avoid nuclear meltdown gets misplaced in the LA sewerage system; Walter discovers a new way to communicate with Paige.

Walter chooses work over spending time with his friends on Christmas Eve, before a fall down the stairs results in an injury that sees him enter a dream world where Team Scorpion never existed.

Paige's maternal side kicks into high gear, when an unconscious boy gets stuck in the wheel well of an airborne plane. Meanwhile Walter's white lie to Paige starts to take a toll on him, and Paige realises something is amiss.

The team must help a teen pilot and his girlfriend when they lose radio contact across the Pacific during a power outage in Los Angeles. Walter takes care of a group of Ralph's classmates. Cabe attempts to tell Allie that he loves her.