A Detroit hit man is murdered by one of his colleagues on the streets of Oahu, and Steve is shocked when he learns the killer's surprising motive. Meanwhile, Chin puts his career on the line to help Danny get the money he needs to save his brother's life.moreless
Three young women rob a tour bus, but things go horribly wrong when a man is killed and the women unknowingly steal something of great value that puts their lives in danger.
Mysterious figures are stalking a scientist, and Batman soon learns that they are also going after an old friend, Ava Kirk. Ava's dead father, Paul, resurfaces and explains that the figures are his clones... and they will stop at nothing to capture him.moreless
Gotham gets a new hero when Harvey brings in the mercenary Deathstroke as a new member of his SCU. However, it soon becomes clear that Deathstroke has his agenda... and will do whatever it takes to achieve it.moreless
Barbara tries to balance her personal life and her "career" as Oracle when Killer Croc captures Batman and Katana in a deathrap while she's on a date.
A Batman imposter shoots and seemingly kills Bruce Wayne. While Alfred and Tatsu try to find their friend, Harvey Dent declares a city-wide hunt for Batman since the vigilante has become a murderer.moreless
Batman works out Deathstroke's plan to discredit him, while a deranged Harvey Dent launches a final assault to capture the Caped Crusader so that he can execute him.
Season 5 begins with the island of O'ahu being put on lockdown when Five-0 hunts a terrorist who is using weaponized drones on civilians. Meanwhile, Steve and Danny attend a mandated review with a psychologist that looks like couples therapy.moreless
Batman has himself arrested in order to abduct a high-tech thief locked up in prison. However, he discovers that the prisoner in charge, Killer Croc, wants the Key for himself.
Batman, Katana, Commissioner Gordon, Mayor Grange, and crime lord Tobias Whale are abducted by Humpty Dumpty and forced to play a macabre game to find out which among them is guilty of a crime. However, none of them know what the crime is or who did it.moreless
Batman and Katana investigate a mysterious "Golem" that is protecting the people of Old Gotham, and discover that it's the transformed Rex Mason, now an elemental freak. Meanwhile, Harvey gets a new partner.moreless
Six months after the blackout, DA Harvey Dent has been elected to put a stop to Batman. Meanwhile, Batman is framed for an attack on Mayor Marion Grange.
Batman races to save the city from Ra's al Ghul, but finds himself opposed by his arch-villains when Ra's releases them from Blackgate Villain to hunt the Caped Crusader down. Meanwhile, Katana must choose whether to kill Alfred and free her father's soul, or let the former agent live.moreless
Batman must team up with fellow prisoner Silver Monkey to escape the League of Assassins. Meanwhile, Ra's al Ghul reveals the truth to Tatsu about Alfred's involvement with her father's death.
Ra's al Ghul uses the mind-controlled Jason Burr to steal the Ion Cortex from Wayne Industries and plunge Gotham City into darkness.
Magpie breaks out of prison and goes on a rampage, determined to kill Batman's new partner Katana and make herself his sidekick.
Cat fears Vincent must die in order for Gabe to be stopped in the Season 2 finale.
Gabe tries to woo Cat by taking her on a romantic date.
Agent Knox's offer to Cat and Vincent for a normal life together is accepted, but influences out of their control work against them.
Vincent and Cat try to hide out when they become the object of a city-wide manhunt. The FBI gets in touch with them to ask for help on a significant case.
Priscilla fights her way back to reality with the help of Aaron and Rachel. Trueman's atrocities escalate as he tries to stop the resistance. Bass and Miles kidnap the President.
With his wife and son now dead, Neville joins with Bass to seek his revenge on the patriots. Rachel finds out about Priscilla, and Miles and Charlie pinch a steam train.
After receiving inside information from Jason, Miles and Monroe head to Austin to try and sabotage the Patriots' plans. Aaron becomes concerned over Priscilla's odd behavior.
Rabbit is back with a small army, meaning Lucas and Carrie must fight for their lives. Back in Banshee, Rebecca proves her loyalty to Kai.
Carrie's marriage is put under further strain, while she and Lucas must prepare for an inevitable showdown. All is not looking good for Kai, Burton tries to identify and silence traitors, but Alex makes a vow to ensure Kai stays behind bars. Meanwhile, Job's trip to priest has consequences and the Banshee deputies are getting restless.moreless
While Lucas finds a way of getting Proctor, Emmett is targeted for revenge by Sharp and his skinheads.
While Lucas is looking for a way to take Proctor down, once and for all, Alex's future as Chief is decided by the council.
Gordon and Deva find that they need Carrie in their lives and Rebecca receives a lesson in loyalty from proctor. Meanwhile, Lucas Jason's past catches up with him.