An escaped convict out to prove his innocence kidnaps Steve and Danny. Grace punches out another student at school.
The two worlds collide as Sleepy Hollow is rocked to its core in the final battle between Good and Evil.
The murder of Chin’s father, 15 years ago becomes the focus of Internal Affairs and there are questions regarding Malia’s relationship with Chin and its impact on the prior investigation.
Abbie and Ichabod must find a way to save Abbie's sister, Jenny, who has been possessed by an evil spirit.
Captain Grover is aided by McGarrett in his search for a friend who has disappeared, after it seems like he's committed murder. Kono persists in her quest to find Adam.
A serial killer at the heart of Five-0's investigation puts Chin's life in danger. While on the shores of Oahu, Danny and Grace come upon an odd puzzle box.
When someone tries to kill a Pearl Harbor veteran, Five-0 links evidence to a crime committed within the internment camps on Oahu during World War II.
While attempting to communicate with Katrina in Purgatory, Ichabod and Henry Parrish unwittingly unleash a new evil.
A Colonial house from Ichabod's era may hold they key to finding a missing person... and a secret from Ichabod's past.
With the President on the way to Oahu, Five-0 is tasked with the murder investigation of a secret service agent. Steve's Aunt Deb comes for a visit along with an eye opening secret.moreless
Jenny returns to Sleepy Hollow to help Ichabod, Abbie, and Captain Irving against the Horseman, only to realize his true motive wasn't what they believed.
With national security in mind and at the behest of the Governor, McGarrett and Captain Grover set out to serve a warrant on a young computer hacker.
As Ichabod and Abbie deal with the Horseman as it seeks its skull, Abbie gets an unexpected visit from Andy Brooks.
Five-0 is tasked with babysitting Mary's newly adopted baby, even as they investigate the murder of an undercover ATF agent.
Ichabod disappears and Katrina contacts Abbie in her dreams to warn her that the Headless Horseman is returning, and that she should seek out a reclusive man, John Parrish. Meanwhile, Ichabod encounters a figure from his past.moreless
Halloween and a shooting have Hawaii Five-0 looking for a man carrying out experiments and turning humans into zombie-like creatures.
Ichabod and Abbie are called in to investigate the case of an unidentified boy who has turned up in town. As they investigate his background, they discover a surprising mystery.
Jenny Mills escapes from the institution and Ichabod and Abbie set out to find her before their enemy does. In the process, they learn more about the demon they are facing.
Five-0 assists a Texas Ranger in finding his missing daughter when they cross paths with him during a murder investigation. Adam and Kono run into problems and find themselves fighting for their lives.moreless
The Sandman, another member of the army of evil, tortures the people of Sleepy Hollow by infiltrating their dreams and turning them into nightmares. When the Sandman targets Abbie, she must seek out her institutionalized sister, Jenny, and face her past.moreless
Steve and Wo Fat fight to escape from the attack on the maximum security unit. Catherine is taken hostage when Five-0 headquarters is seized. Five-0 goes behind the new SWAT Commander’s back to rescue Catherine. Kono and Adam find themselves exposed while hiding in Hong Kong.moreless
While still adjusting to his 21st century reality, Ichabod and Abbie continue on their quest to clear up Sleepy Hollow's mysteries. After a vision from Katrina, the two set out to look for a witch from the 1700s. The witch has been awakened and is intent on destroying Sleepy Hollow. Despite what happened to him, Andy Brooks is back and pursuing his own agenda.moreless
Ichabod Crane awakens in modern Sleepy Hollow and realizes that evil has came with him. While on a call Sheriff Corbin is killed by the Headless Horseman which is witnessed by Lt. Abbie Mills. With her own childhood supernatural experiences, Abbie forms an unlikely bond with Ichabod. The two of them set out to stop evil and figure out mysteries dating back to the 1700s. Captain Irving at first is reluctant to believe Ichabod's tales but soon after Ichabod's former wife Katrina gives clues about coming evil, they all start to believe that Sleepy Hollow is anything but sleepy.moreless
Five-0 is assigned by the CIA to find a missing federal prisoner after the plane he is being transported to Oahu on arrives without him, but instead has four dead bodies. After being set up for a murder, Kono finds herself on the outs again with the police force. Steve has another surprising encounter with Wo Fat. Danny reconnects with Gabrielle.moreless