A deadly explosion in the oil fields sends June on a mission to save as many lives as possible. Meanwhile, an investigation by Virginia threatens to undermine June’s work.

When Dakota goes missing, Strand sends Alicia and Charlie on a search and rescue mission to find her. An unlikely ally provides a new possibility of escape from Virginia.

Mortally wounded Morgan must decide whether to help a desperate stranger while a mysterious bounty hunter tries to finish what Ginny couldn’t.

Grover and Five-0 investigate a murder at a private golf course involving a man who was frozen to death in the locker room’s cryo-chamber. Also, McGarrett tags along with Danny…

Soon after Danny meets the girl of his dreams, they get into a potentially fatal car accident in an area far from help. Also, McGarrett enlists Quinn and Tani to…

When Grover’s niece, Siobhan goes missing from the police academy and it’s discovered her boyfriend is an undercover member of the Yakuza, Adam may be her only hope of rescue.

On Valentine’s Day, Tani and Noelani are held hostage during a convenience store robbery. Also, Five-0 investigates the hug of a Thai diplomat whose wife confesses to the crime, but…

Harry Langford helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s. Also, Tani and Junior’s friendship takes a meaningful…

While Five-0 investigates a murder on a cargo ship where pirates impersonated the Coast Guard to board the boat, Adam finally gets the evidence he needs to take down the…

While Five-0 investigates when a rancher is murdered after he uncovers human skeletons on his property where legend says that Civil War-era gold coins were buried, Quinn’s former stepdaughter, Olivia,…

While Five-0 investigates a scheme to rob tourists, Tani helps Girard Hirsh (Willie Garson) prove the innocence of his elderly uncle when he’s suspected of murder. Also, Tani and Junior…

After Steve receives a posthumous letter from his mother that contains a cypher, Danny is attacked by someone willing to kill to steal it. Five-0 must help Lincoln Cole, an…

Danny is abducted and badly wounded by Wo Fat’s wife, who is after the cypher Steve’s mother left him. Steve works to solve the case his father left for him…

When a list of undercover CIA agents is stolen, Steve and Five-0 enlist the help of Magnum, Higgins, Rick and TC to get it back and protect national security. Also,…

When one of 51’s own gets injured on a call, Lt. Severide becomes obsessed with helping out. Foster contemplates a big decision. Kidd is concerned for one of her high…

Firehouse 51 welcomes a new member to the team, whose presence could provide some complications. Brett’s leadership shines during a scary call. Boden sees great potential in Kidd and proposes…

Lt. Severide teams up with Seager and the OFI when a motel structure fire turns suspicious. Firehouse 51 members become amateur sleuths following a Reddit post involving one of their…

Brett and Mackey find their lives in peril. Casey and Brett tread in unfamiliar territory. Severide chases a memory while Kidd adeptly solves a firehouse problem. Ritter puts himself in…

Tension builds when a group of rabble-rousers attempt to lock down the firehouse. Brett is faced with a monumental decision. Cruz readies himself for a big day. Gallo and Ritter…

A series of teen opioid overdoses sees Severide partner with Sean Roman, but begins to suspect there’s more to the story than his old friend is telling him. Casey tries…

Boden is on edge after starting a new fad diet. Casey and Severide disagree on a call. Brett’s birth mother shares life-altering news. A familiar face has a proposition for…

Things get personal for Casey and Gallo in the aftermath of a suburban house fire involving a mother and her young son. Herrmann campaigns for more respect. Kidd has an…

A pest control problem forces the 51 team to temporarily bunk with Firehouse 20. All under the same roof, Casey clashes with Capt. Delaney while Foster, Kidd and Brett fear…

A series of false alarms at a private school hinders the firehouse’s ability to respond to legitimate emergency calls. Kidd asks for ideas to surprise Severide on his birthday. Cruz…

The surprising arrival of a new fire truck brings both joy and chaos to members of Firehouse 51. Boden and Severide are asked to make peace with an old foe…

A series of mysterious gas leaks has members of Firehouse 51 puzzled and spread thin. Brett’s conflicted when her birth mother gets serious about tracking her down. Severide misunderstands his…

Members of Firehouse 51 are dismayed to learn their boundaries have been redrawn to overlap with an adjacent station and problems quickly arise. Casey and Gallo hunt a missing piece…

Firehouse 51 welcomes a new member to the team, whose presence could provide some complications. Brett’s leadership shines during a scary call. Boden sees great potential in Kidd and proposes…

Brett and Mackey find their lives in peril. Casey and Brett tread in unfamiliar territory. Severide chases a memory while Kidd adeptly solves a firehouse problem. Ritter puts himself in…

A revelation about Jemmy forces Roger and Brianna to choose between staying in the eighteenth century and returning to the safety of the future. Jamie finds that unrest in the…

Claire struggles to survive brutal treatment from her captors, as Jamie gathers a group of loyal men to help him rescue his wife. Meanwhile, Roger and Brianna’s journey takes a…

The Regulator Rebellion reaches a boiling point, forcing Jamie to face his fear and confront the consequence of his divided loyalties.

The Frasers must come to terms with all that has changed in the aftermath of the Battle of Alamance Creek. Brianna tries to help Roger overcome the trauma he has…

When Jamie is bitten by a venomous snake, Claire fears she may not have the resources to save him. Jamie asks Roger to complete an important task in the event…

Jamie and Roger implement their plan to eliminate the threat looming over them, but it goes awry. Brianna is forced to confront her greatest fear and fight for her and…

At Jocasta’s wedding, Jamie learns Tryon’s true motivation for ending the Regulator threat.

Claire struggles to survive brutal treatment from her captors, as Jamie gathers a group of loyal men to help him rescue his wife. Meanwhile, Roger and Brianna’s journey takes a…

Following celebrations in honor of Brianna and Roger’s wedding, Governor Tryon reminds Jamie of his obligation to hunt down and kill Murtagh Fitzgibbons.

As Jamie continues to hunt Murtagh with the aid of the zealous Lieutenant Hamilton Knox, he’s forced to consider whether or not he’s on the right side of history.

The growing Regulator threat forces Jamie, Claire and Roger to embark on a mission to raise a militia.