ION Mystery On the eve of Adam and Kono's wedding, the Five-0 must stop a fanatical patriot who wants to detonate stolen nuclear warheads and place the blame on a terrorist -- resulting in a new war on terror. 2026-10-19 The team investigates a centuries-old pirate story involving buried treasure; Gabriel kidnaps Kono and Adam on the morning after their wedding. 2026-10-19 A bomb squad is attacked, and the culprit threatens to detonate hidden explosive devices unless arsonist Jason Sinclair (Randy Couture) is released from prison. 2026-10-19 A scuba diver is killed with a gun that was used in a recent murder; McGarrett gets ready to propose to Catherine. 2026-10-19 A wealthy recluse's corpse is found in a field with almost $1 million in counterfeit bills; Adam is abducted and forced to torture one of Gabriel's men. 2026-10-19 The team questions members of a stunt biker gang when a killer escapes by jumping his motorcycle from roof to roof; the team prepares for Tough Mudder. 2026-10-19 McCluskey recruits Toby on a case involving smuggled weapons. 2026-10-19 Toby investigates an assassination threat against a Conservative leadership frontrunner. 2026-10-19 Toby and Michelle investigate a murder. 2026-10-19 Toby is brought in to investigate some corrupt cops, but finds himself in over his head when one of them ends up dead from a suspected drug overdose. 2026-10-19 When Elvis Bertrand's "daughter" is linked to a murder case, he asks Pride to prove her innocence. 2026-10-19 Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise; unbeknownst to Hannah, her husband approaches Pride with new intel on an underground spy network. 2026-10-19 The NCIS team investigates a deadly bombing at a military museum event with over 1,000 people in attendance. 2026-10-19 Pride and LaSalle travel to war-torn South Ossetia to locate an FBI agent who was kidnapped during a failed mission to apprehend the leader of Apollyon, the underground spy network responsible for murdering Pride's father. 2026-10-19 After tracking Apollyon, a deadly underground spy network, to war-torn South Ossetia, Pride is separated from the team and faces grave danger; in order to save Pride, the NCIS team must locate a mole who continues to feed information to Apollyon. 2026-10-19 Pride must cut his vacation short when Hannah is suspended for breaking protocol during a joint investigation with the FBI. 2026-10-19 A Navy pilot says she saw an unidentified object prior to a private plane crash; Pride suffers from insomnia and nightmares as a result of being kidnapped and drugged last year. 2026-10-19 Pride travels to New York City after new DNA evidence is linked to a 20-year-old cold case from his past. 2026-10-19 The team uncovers a sinister plot by a private detention center contracted by the government to house undocumented immigrants; LaSalle and Sebastian travel to Alabama to search for LaSalle's missing brother. 2026-10-19 Navy Lt. Max Landry asks the New Orleans field office for help when he suspects his girlfriend is a spy; LaSalle faces another devastating dead end as he searches for his brother's last known whereabouts. 2026-10-19 LaSalle hopes to avenge his brother's murder by tracking a drug ring in Alabama he believes is responsible; when Pride assists with the case, he crosses paths with Eddie Barrett, an elusive individual who knows more than he is sharing. 2026-10-19 Following a natural gas explosion at a movie theater, the team discovers the gas company has been hacked, and more explosions could be triggered. 2026-10-19 Sebastian calls the team to assist with a possible kidnapping case when a dignitary's son he was assigned to protect disappears from a local concert venue. 2026-10-19 After Eddie Barrett provides an alibi witness, Pride and the team are more determined than ever to find a break in the case and avenge LaSalle's murder. 2026-10-19