ION Mystery

Team Scorpion must work with their old nemesis Mark Collins to prevent the extinction of mankind; Walter and Paige awkwardly navigate their new relationship.

Team Scorpion continues work with their nemesis to prevent humanity's extinction; Cabe's last-minute decision while on the case endangers his career.

When poachers almost kill a pregnant deer, the team tries to save the deer and the fawn; Happy and Toby discuss the future of their family.

Danny and McGarrett work on their relationship as they pursue a woman who escaped after a diamond robbery.

When Chin and Danny are taken into custody over past deadly transgressions, McGarrett turns to Joe for help.

McGarrett and Odell come under assault at the barbershop while trying to protect a young man being hunted by a gang; Jerry is accused of a series of home invasions.

The wife of one of Grover's closest friends falls to her death; Dr. Shaw and Danny are stuck in an elevator with a body that needs processing.

After a murder takes place at a convention of Elvis impersonators, the victim's body is stolen; Gabriel asks Chin for help.

When a dead woman is found in a hotel suite belonging to three married, hungover men, the team must help them retrace their steps as they try to remember what happened -- and find the killer.

During a solo outrigger trip, Kono encounters bad weather and must fight for her life; the Five-0 investigates a man in trouble for cooking meth.

After apprehending a fugitive, a bounty hunter is murdered; Rachel reveals a secret to Danny that has ramifications; Chin talks to McGarrett about his concerns regarding Adam.

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.

The team investigates a centuries-old pirate story involving buried treasure; Gabriel kidnaps Kono and Adam on the morning after their wedding.

A bomb squad is attacked, and the culprit threatens to detonate hidden explosive devices unless arsonist Jason Sinclair (Randy Couture) is released from prison.

A scuba diver is killed with a gun that was used in a recent murder; McGarrett gets ready to propose to Catherine.

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.

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.