FBI Agent Claire Bennigan investigates a six-year-girl who attempted to murder her mother, and soon comes to believe that a mysterious person named Drill is manipulating children into killing their parents. Meanwhile, Defense Department agent Wes Lawrence is summoned to the Sahara Desert to investigate a bizarre fulgurite structure holding a missing F-22 that disappeared 4,000 miles away.moreless
Alan and Jordan's work on decoding the virus is seeing progress, while Julia is being cured by Hatake.
Gus investigates a man who has replicated Gus' life and is enamored of the private investigator he meets during the case.
On day 5, Alan tries to find out what happened to Doreen after discovering her body, Julia finds a helpful friend on Level R, Sarah keeps hiding an infected patient in her room and Balleseros tries to find the mysterious Dr. Hvit.moreless
On day 4, the quarantined people on Level R force Dr. Hatake to re-etablish communication by cutting off the air supply. Meanwhile, Peter's condition worsens quickly, forcing Alan to try the untested universal treatment, Sarah has to question her rapid response test and Doreen gets closer to figuring out Balleseros.moreless
Elena tries to keep Clayton at arms length, but he lets her know he'll do whatever it takes to get her back in his life for good. Elena uses the search for the deadly "mutt" as a distraction from her complicated personal life, but things get worse when a second dead body is found on Stonehaven's property.moreless
On day 3, Peter seeks Alan's help before he collapses, Sarah finds a rapid response test for infected patients, Julia begins to slowly feel the effects of Peter's attack while Balleseros helps Doreen get another monkey sample.moreless
Elena, a werewolf trying to live a normal life, is summoned home by Jeremy the leader of her Pack when they come under attack by an unknown enemy. But returning to Stonehaven means facing Clayton Danvers, the only man Elena has ever loved, and the one who betrayed her by changing her into a werewolf.moreless
The CDC team tries to find a treatment for the infected patients and contain the virus by hunting down the ones who were exposed to the virus. Meanwhile, panic rises amongst the people on the station.moreless
A consultant is brought in to evaluate everyone's effectiveness as detectives, but their alleged misdeeds are matched only by the quirkiness of the consultant.
Amanda holds Alex captive and offers Nikita Alex's freedom in exchange for Ari's. Michael puts Nikita and Sean in charge of the prisoner exchange, but Ryan makes a last minute addition and adds Owen to the mission, leaving Michael suspicious. While captured, Alex befriends a fellow prisoner named Larissa and vows to promises to free them both from Amanda. This promise eventually conflicts with Nikita's plan, forcing Alex to choose between Nikita and her promise to Larissa.moreless
After Rebekah declines Klaus' demand to stop Kol and protect Jeremy, Klaus looks to Stefan for help. An angry Bonnie confronts her father Mayor Hopkins, about his unconventional methods to protect Mystic Falls from violence. After their disagreement, Bonnie has a frightening encounter with Kol, followed by a visit from an unexpected guest. Klaus adds to the tension between Stefan and Damon by revealing some information about Stefan's personal life, then surprises Damon by asking for some advice. Elena puts Stefan in a difficult spot after revealing her dangerous plan to save Jeremy. After Mayor Hopkins cancels the high school's 1980s Decade Dance, Stefan finds a charming way make the evening special for Rebekah.moreless
Nikita and Owen take on a rogue "cleaner" named Liam, while Michael adjusts to a new role within Division. Michael and Nikita's face some relationship challenges as he watches Nikita work with Owen.moreless
Madison and Hauser look for Johnny McKee, the latest Alcatraz inmate to surface. He's a chemist with a vicious killer instinct. More details emerge about Madsen's grandfather, Tommy Madsen.
Cassie is shocked when an evil figure from her past arrives at her doorstep. Cassie quickly becomes suspicious when the man asks her to return the medallion she found among the wreckage of the fire that killed the parents of several of The Circle's members. Cassie takes off but is taken captive by Eben and the witch hunters. Jake offers to trade himself to free Cassie, and Adam turns to the Circle for help when he realizes what has happened. Meanwhile, Faye and Diana worry about when Melissa as she starts spending more time with Callum.moreless
In Clean Sweep, Percy holds members of Oversight hostage as leverage to make Amanda meet his demands. He threatens to let deadly gas loose inside Division. One of his hostages is Sean's mother, and Sean goes to Nikita seeking help. Nikita must decide whether to save the innocent lives within Division or let the enemy of her enemy become her friend.moreless
When a dead body is found at a local winery and their hotel room is robbed, Shawn and Juliet kiss their hopes for a romantic weekend away from work goodbye and join the investigation.moreless
Cassie and Jake investigate her father's side of the family, hoping to learn more about her lineage and why she has powers separate from the Circle. Meanwhile, Adam becomes protective of Cassie when Faye says that she suspects that Jake might be hiding a dangerous secret from the group. At the same time, Adam is equally worried when Melissa's cousin Holden arrives in Chance Harbor and catches Diana's eye. A power shift takes place between Charles and Dawn, which threatens to destroy their plan.moreless
As McGarrett and his team close in, criminal mastermind Wo Fat retaliates against Five-0. And without the Governor backing them up, McGarrett's showdown with Wo Fat could mean the end of Five-0.
Agent Kaye's information has helped Five-0 narrow in on capturing Wo-Fat, but before they can act Danny becomes exposed to a lethal chemical. The investigation into this neurological agent takes precedence as Five-0 must prevent a bio-terrorism threat to the island.moreless
A renowned photographer has been murdered and Danny thinks this case may be the best one yet when he has to talk with the models in town for a sports magazine's annual swimsuit cover shoot.moreless
Five-0 must intervene when a NYPD detective goes seeking revenge against a local crime lord.
Steve and Danny stumble upon a homicide case while out searching in the jungle for Hawaiian petroglyphs. While on a visit with Chin Ho to visit their dying aunt, Kono learns what really happened to end Chin Ho's career with the Honolulu police.moreless
Five-0 combs a convention to find the killer of a sci-fi fan who was thrown out of a high-rise window. A CIA agent who's interested in the Yakuza that killed McGarrett's parents shows up in town to meet with Steve.moreless
When a Judge's daughter is murdered, the team must figure out why, before more killings occurs. Danny's brother Matt is in town but a family reunion is not the reason.
The team must deal with pirates who've taken a pleasure cruise full of spring breakers for ransom, as well as their worried parents.
Five-0's latest case involves the only witness in a high-profile murder case who's gone missing. They must find her and keep her safe from those who want her dead.