After an NSA analyst is found eaten by a shark, the team's investigation leads them to a cartel's money-laundering scheme and sends Callen into a mental asylum to find a key witness; Kensi struggles with her therapy.

Five-0 must free McGarrett's mother, Doris, when Catherine informs them that she was captured and is about to be executed after attempting to free Wo Fat's imprisoned father. Also, Chin loses his appeal to have Sara's adoption delayed, and she must move to Mexico.

MacGyver is tasked to go undercover as an inmate in a maximum security prison to break out El Noche, a notorious drug kingpin, using only batteries and salt, and track him to his cartel's secret location and dismantle it.

The powerful family of a retail empire closes ranks when a bartender accuses one of their own of rape.

The investigators attend the gala grand opening of a mob museum, only to witness an attempted hit on mob lawyer and former mayor Oscar Goodman.

A bank holdup leads the team to a safe deposit box, the contents of which have the potential to destroy national security; Kristen is eager to get back into field work while other team members still have their concerns.

On Coruscant, former Imperials find amnesty in the New Republic.

Caught by Starfleet and facing court martial, paranoia grows as Picard struggles to uncover whether a prodigal crewman from his past has returned as an ally – or an enemy hellbent on destroying them all.

On Halloween, Five-0 investigates the murder of a medium with a checkered past who was apparently scared to death by a poltergeist. Also, Kono and Adam are kidnapped by what appears to be a death cult.

A 6 year-old boy disappears from his bed in the midst of a wild, drug-fueled party thrown by his mother. With a child's life on the line, the case causes Benson to scrutinize her own role as a mother.