As Five-0 investigates a double homicide involving marital infidelity, McGarrett and the team recount their disastrous Valentine’s Day experiences.

While Danny’s mother is questioned by the FBI, McGarrett partners with a young man with autism who may have information to help solve the murder of his only friend.

When Five-0’s sketchy confidential informant is accused of murder, McGarrett asks his old friend Odell Martin to defend him.

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…

Thomas Rhett guest stars as himself, performing his #1 hit, “Die a Happy Man,” in this all-new episode. Rayna and Deacon are distraught when Maddie runs away from home, and…

Rayna and Deacon try everything they can think of to reunite with Maddie and avoid court, even involving Teddy from jail. Juliette tries to rekindle her relationship with Avery, and…

Rayna and Deacon fight to regain the trust of a determined Maddie as she seeks independence, but their efforts are undermined by someone they thought was an ally. Scarlett and…

Rayna makes a last-ditch effort to protect her oldest daughter from the perils that befall young artists. Juliette reunites with her “Shenandoah Girl” co-star Noah West on the Oscar campaign…

After nearly two decades, Rayna and Deacon face the facts of their storied and often tempestuous relationship. Scarlett makes a startling self-discovery in between tour dates while Gunnar performs with…

Rayna resorts to drastic measures when she learns that Maddie has crossed paths with a duplicitous figure from her past. Juliette must choose how to publicly reckon with the truth…

It’s the wedding viewers have longed for when Deacon and Rayna tie the knot, complete with captivating music performances by series regulars Charles Esten, Clare Bowen, Sam Palladio, Lennon Stella…

Luke asks his old pal Riff Bell to accompany him on tour. Meanwhile, a new singer named Vita arrives at the Beverly, but Frankie clashes with Deacon and Rayna about…

Luke and Riff are excitedly planning their upcoming tour, but Luke soon realizes he may have moved too quickly in the decision to have Riff on the road again. Meanwhile,…

A familiar face—Juliette Barnes—finally returns to Nashville after receiving treatment for postpartum depression and finds herself at a critical crossroads upon her homecoming. Layla, weeks away from launching her first…

The Exes find navigating their newfound fame tricky business when they go out on the road with Autumn Chase. Meanwhile, back in Nashville, Maddie continues to grow closer with Cash,…

It’s Christmas Eve and Team Scorpion’s electronics-free mountain getaway turns deadly when they come across gun-runners, and Ralph is kidnapped when they try to escape.

The team members set aside their personal and romantic issues when hackers take over targeted U.S. military aircraft and war ships, pointing the weaponry at American cities.

The team members set aside their personal and romantic issues when hackers take over targeted U.S. military aircraft and war ships, pointing the weaponry at American cities.

When Walter is accidentally launched into space in a rocket, he hallucinates about Paige as his oxygen runs low, and Team Scorpion works feverishly to find a way to bring…

Team Scorpion must find a boy from Ralph’s class who goes missing on a field trip after he accidentally has a run-in with a deadly criminal. Also, Toby gets closer…

Team Scorpion’s simple job at the Los Angeles Natural History Museum turns deadly when they discover thieves robbing a rare gem exhibit in order to get materials needed to enrich…

Before Halloween, Team Scorpion must infiltrate a deep, vast cave system in order to prevent a bat population from destroying the North America ecosystem. Also, the team dons costumes to…

On Election Day, as democracy hangs in the balance, Team Scorpion is called on when someone tries to throw the U.S. presidential election into chaos.

When Team Scorpion travels to Ireland for Megan’s one-year memorial, Walter discovers that a nearby lake’s natural disaster has created a poisonous cloud that could kill everyone in the village….

Paige’s estranged mother calls on Team Scorpion when she accidentally uncovers a forgotten nuclear reactor on the verge of exploding.

Walter must swim through the deadly La Brea Tar Pits when Team Scorpion helps a woman trapped in the tar before she runs out of oxygen.

Boden and Jimmy are at odds. Kidd deals with her unstable ex. Dawson continues her quest to foster Louie. Casey’s new political consultant urges him to think big. The team…

Dawson saves a young boy from an apartment fire. Kidd’s idea for Molly’s doesn’t go as hoped. Severide hits a wall while advocating for new fire masks. Cruz and Brett…

The team responds to a building collapse that’s trapped more than a dozen people. Dawson’s quest to foster Louie is aided by a familiar face. Otis, who’s on medical leave,…

Sylvie witnesses a murder and is threatened by the shooter not to go to the police. Firehouse 51 jumps into action when a fire breaks out at a restaurant and…

Casey steps up to help a teenager being bullied by a gang; Severide bonds with a detective’s son after her life is threatened; and Kidd and Herrmann go head-to-head in…

Firehouse 51 unites to help a young boy in tragic circumstances. A high-powered political consultant helps Casey navigate a potential scandal. Cruz makes a mistake that nearly costs him his…

Casey reconsiders his run for alderman after he’s targeted by a propaganda campaign. The squad responds when a man is trapped inside of a burning car. Trudy’s nerdy brother plans…

Severide and Cruz find a child’s remains inside a chimney while investigating a possible carbon monoxide leak inside a home. In other events, Casey braces for the worst in his…

Lt. Casey and Dawson apply for permanent adoption of Louie, but quickly discover a hurdle. Firefighter-turned-medical student Jeff Clarke approaches Lt. Severide with an interesting proposition. With hopes of reinvigorating…

The team responds to a mass shooting; Casey investigates the missing money from the fund-raiser. Jimmy agrees to represent the firehouse in a boxing match against the Chicago PD’s 21st…

Severide confronts Chili about her erratic behavior. Members of the firehouse rally around Casey, who they think would make a great candidate for alderman. Jimmy squares off against Antonio in…

The team responds to a suspicious call from a neighboring firehouse; and welcomes a new firefighter, though her addition has repercussions. Casey moves forward in his run for alderman.

A tornado threatens Chicago. Chili makes a major mistake, which causes Brett to report her to Boden. Otis asks Dawson to help him solve his women troubles. Severide assists a…

While responding to a call in the field, Dawson accidentally hits a pedestrian who stepped in front of the ambulance, and is left to deal with the repercussions. Lt. Casey…