Season 7 begins with the body of a serial killer being found in Five-0 headquarters with an ivory chess piece in his mouth. When a second serial killer is found dead with another chess piece, Five-0 hunts for the vigilante as fear spreads that it's not safe to travel to Hawaii. Meanwhile, McGarrett refuses to take it easy, even though he is recovering from surgery.moreless
Five-0 gets trapped inside a dilapidated building in Oahu's Chinatown, where they try to protect a wounded Gabriel and plan their escape. But gunmen looking to kill Gabriel storm the building.
A woman is murdered in her home and Five-0 learns that one of their own has a deep connection to the victim's young daughter.
Five-0 hunts a Russian spy who stole a flash drive containing classified NSA information that puts one of their own at risk. Meanwhile, McGarrett learns why Catherine left him; and Abby continues to conceal her actual mission from Chin and Five-0.moreless
Danny's mother is questioned by the FBI. Meanwhile, McGarrett partners with a young man with autism who may have information that could solve the murder of the man's only friend.
As Five-0 investigates a double homicide involving marital infidelity, McGarrett and his team recall their disastrous Valentine's Day experiences.
McGarrett's Aunt Deb visits Oahu on a very personal mission. Meanwhile, Five-0 investigates when some unstable Japanese World War II bombs left behind on the island are stolen.
The brother of a promising local boxer is murdered and the chief suspect is the outspoken reigning champion opponent from the mainland.
Five-0 works with a charming con man to find a killer, after his female partner is murdered on the job. Meanwhile, San Francisco police inspector Abby Dunn helps Chin investigate the murders of five Chinese arms dealers.moreless
To stop more Omec from invading Earth, Nolan must lead a small team on a suicide mission to destroy Kindzi's cruiser.
Nolan and the other learn about the pending Omec invasion and search for Kindzi. Meanwhile, Datak convinces Yewll to give him a fighting chance against his Omec captors, and Stahma tries to make amends with her son.moreless
Berlin returns to Defiance and helps Irisa find Nolan, who was abducted from the VC convoy. Meanwhile, Kindzi drains T'evgin of his blood to keep him captive, and Datak asks Yewll for help defeating the Omec.moreless
The VC send a representative to Defiance to negotiate a peace with T'evgin. However, complications from Nolan's recent operation complicate matters. Meanwhile, Datak returns from the dead only to discover that T'evgin is in love with Stahma.moreless
An unknown creature tears apart an Indogene, and Yewll appears to be the victim... until she turns up alive and well. Meanwhile, Nolan comes to terms with the death of the militia under his command, and Stahma tries to apologize to Amanda.moreless
Nolan and the militia receive help from an unexpected ally, but learn that he's not all that he appears. Meanwhile, Amanda gives Datak the chance to restore his honor and redeem himself when Yewll comes up with a way to defeat the VC army.moreless
An arms dealer brings Defiance deliverance, but asks for a drink with Berlin as his only price. Meanwhile, Datak is sentenced to death and prepares for his execution, and asks a sacred favor of his son.moreless
Datak and Stahma go on the run when Alak exposes them to keep his son. Meanwhile, the Omec refuse to help Defiance, and Rahm receives a visit from home.
Yewll works desperately to save Nolan and Irisa, and is forced to turn to the Omec for help. Meanwhile, Alak escapes from Rahm, and Stahma takes steps to thwart her husband's plan to assassinate T'evgin.moreless
After someone blows up the Arch, Nolan and Amanda travel to an E-Rep weapons cache to replace the weapons destroyed by the Shrill. However, they end up meeting an old friend. Meanwhile, Stahma receives new orders from Rahm: assassinate T'evgin.moreless
Nolan races to save Tommy's life and stop Irisa; tensions between Amanda and Stahma lead to a showdown.
Nolan fights to save the planet from the arkbrain's terraspheres under Irisa's control. However, E-Rep--and Amanda--are willing to kill Irisa to stop her rather than risk all on Nolan's plan. Meanwhile, Pilar abducts Christie and Alak, forcing Datak and Stahma to rescue Rafe and go after them.moreless
A deadly mine collapse leaves Amanda and Niles trapped, and it's a race against the clock for Nolan and Rafe to save them. Meanwhile, Irisa convinces Tommy to help her steal a terrasphere, while Rafe learns that Quentin has made a deal to free Pilar.moreless
While Nolan sets out to find his missing daughter, Amanda becomes a volunteer deputy to find the murderer of one of her prostitutes.
Kenya returns, much to Stahma's dismay, but she holds a secret locked in her memories. Meanwhile, Dr. Yewll attempts to hide some dark secrets of her own.
When Nolan and E-Rep arrest a VC terrorist in Defiance and try to determine the location of a bomb, the terrorist's compatriot calls Amanda and tells her to free the man... and claims to have her missing sister Kenya.moreless
A dead Castithan hand maiden shows up on Datak's doorstep, her eyes removed, and he turns to Rafe for help. Meanwhile, Irisa meets the man from her visions, and Alak discovers that Christie is going to the Janus club behind his back.moreless
An Arkfall crash salvage mission led by Nolan leads to danger in the form of an alien race he has never encountered before; at the same time, Stahma makes a shocking power play after she's admonished by church elders for her growing sense of female empowerment; and Irisa begins confessing her deep, dark secrets to Tommy.moreless
A stalker comes after Amanda, raising concerns for both Nolan and Niles.
Raiders steal E-Rep mining equipment and humiliate Niles, and the mayor orders Nolan to find them. The Lawkeeper soon determines that Rafe is involved, forcing the miner to make an impossible decision. Meanwhile, Datak returns to restore balance to his family.moreless
While Irzu's influence on Irisa grows, Niles makes an arrangement with Yewll and Datak realizes that Stahma doesn't want him to come home.