When Grace goes to her Winter Formal, Danny offers to chaperon because he wants to know who her date is. When he discovers who it is, he takes him to the bathroom to talk ...

Five-0 must free McGarrett's mother, Doris (Christine Lahti), when Catherine (Michelle Borth) informs them that she was captured and is about to be executed after attempt ...

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 w ...

When an armored vehicle crashes into a gun club, the team is called in. They arrive and the vehicle just stays there, it suddenly moves and stops. Steve goes to apprehend ...

Five-0 must find McGarrett and Alicia when they are kidnapped by the serial killer they've been hunting. ...

Alicia Brown finds a dead body in her bed, which was placed by the serial killer 5-0 is looking for. A girl whom Kono knew when she was surfing calls her because she was ...

Five-0 must work with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to meltdown. Also, McGarrett and Danny ask reti ...

When the bodies of two serial killers are found on Five-0 property with chess pieces in their mouths, McGarrett and the team hunt for a vigilante as fear grows that touri ...

When a friend of Nahele dies from an overdose, it seems like he took new drug which has been killing a lot of people. Steve sets out to stop it so he arrests a known deal ...

5-0 gets a tip where Gabriel Waincroft is. The team goes there and finds him shot. Just as they are about to leave, some men with guns show up. They assume Michelle Shiom ...

When a woman is murdered, the team investigates. When they are done, Hirsch who works as a clean up guy shows up. And it's while cleaning he discovers something, a panic ...

A girl who was babysitting is abducted. The team tries to find her. They learn she was chatting with someone online who could be an online predator. They enlist the aid o ...

A chemical spill causes a mass evacuation at Halava Prison, where Adam is being held and the bus he is on is blown up and one of the surviving inmates is shot and killed. ...

The day begins with an elephant running on the street, they learn that it was from the circus and someone let it out. Before they can look into further, they are told tha ...

Grover for some reason takes his family and goes on the run. When Steve learns of this, he tries to find out what's going on. He calls the Feds but they refuse to tell hi ...

Two men are found floating in the ocean and make it to land. One of them is shot, they're brought to the hospital. The one who is hot dies while the other is unconscious. ...

McGarrett and Five-0 must track down a Russian spy who has stolen a flash drive containing classified NSA information that puts the life of a member of their Ohana at ris ...

Sang Min is arrested for murder he tells McGarrett he didn't do it. And Steve believes him and tells him he will help him. Steve tries to get him a lawyer but no one want ...

An autistic man helps Five-0 uncover the details of a daring bank heist, which ultimately leads to another showdown with Gabriel Waincroft. Meanwhile, Danny learns that t ...

The team unravels a plot to murder a pair of unfaithful spouses, while each member also recounts their disastrous Valentine's Day mishaps. ...

Steve, Danny, Chin and Kono are out surfing and when they disagree on which route is the best to take so they make a bet. So Steve and Danny go their way while Chin and K ...

Steve's Aunt Deb comes to bring the ashes of her husband who just died to be thrown into the sea. She wants to spend time with Steve, his sister, Mary, and Mary's adopted ...

Chin Ho asks Kamekona to go undercover to help solve the murder of a former drug-dealing associate from his past, while Steve and Danny go to a couples retreat to work on ...

Kono has to face Adam may not be with her for much longer. 2 champion boxers compete for the world title, but one of the boxers brother dies. Signs lead to a drug gang, b ...

A body is found in a pig sty and has been eaten up to destroy evidence of a murder. They discover the victim is a professor who is not liked by his students. McGarrett se ...

Five-0 works with a conman to find a killer after his partner is murdered. A San Francisco police inspector helps Chin Ho investigate the murder of Chinese arms dealers. ...

Steve decides he's finally ready, to date again. But things get out of hand very soon, when the couple finds an abandoned plane on a deserted island. Meanwhile, Grover, C ...

Luggage containing dismembered female bodies is found in the woods, and the team realize they are dealing with a serial killer with a shocking resemblance to Dr. Frankens ...

A businessman is shot in his office which is in a high rise building. They learn that the killer escaped by jumping from his building to another with a motorcycle. They l ...

Five-0 investigates when a wealthy recluse is found dead in a remote field with nearly one million dollars in counterfeit bills. Also, Adam is kidnapped by the Yakuza and ...

While the team tries to track down the owner of a gun found in the ocean that was responsible for two deaths, McGarrett and Catherine reach a crossroads in their relation ...

A bomb squad is attacked and the culprit threatens to detonate additional explosives unless his demands are met. Meanwhile, Adam returns and Kono realizes they are being ...