Vertigo causes Laurel to hallucinate an epic fight that pits her Black Canary against her sister Sara. Meanwhile, Chase surprises Thea and Roy warns Thea to stay away from Malcolm.

A case gets personal for Team Scorpion when three convicts break out of prison and one of them is a brilliant hacker who was forced to help the others steal…

Brick and his men take over the Glades, and the police are helpless to stop them. With Oliver nowhere to be found, the team seems helpless. Meanwhile, Oliver tries to…

Brick takes three city aldermen hostage and demands that Mayor Castle turn the Glades over to him in return for their safe return. Meanwhile, Felicity turns to Ray for help…

The members of Team Scorpion must pass a mandated psych evaluation or face being disbanded after they’re accused of destroying a priceless work of art in an attempt to protect…

With Oliver gone, Diggle, Arsenal, and Felicity have their hands full dealing with a new crime lord: Brick. Meanwhile, Ray prepares his battle armor, and in Tibet, a mysterious figure…

Mike and Harvey adjust to their new paradigm. As they butt heads over strategy in Mike’s first foray into investment banking, their new attorney-client relationship may be short-lived. Meanwhile, Pearson…

Ra’s al Ghul sends Nyssa and her lieutenant to Starling City to inform Oliver that the League will kill 50 people a day until Sara’s murderer is turned over to…

To fix a Los Angeles nuclear reactor that’s on the verge of a cataclysmic meltdown, Walter and the team must reluctantly enlist the help of a troubled former member.

A crossover event that began on “The Flash” concludes with Oliver teaming with the Flash to stop a boomerang-wielding killer who plants five bombs in the city that are set…

The Arrow is stalked by an ex-police officer who he rescued during the Mirakuru siege and has become dangerously obsessed with the hero. Meanwhile, Ray asks Felicity to accompany him…

Against Cabe’s advice, Team Scorpion heads to Las Vegas for a simple casino job, but a robbery leads to Walter’s arrest and the rest of the team is left to…

A killer is murdering his victims and attempting to frame Ted Grant. The Arrow finally comes to his aid after Laurel protests her trainer’s innocence. Meanwhile, Roy goes to Felicity…

After failing a military training mission, the team members are determined to prove themselves when an Internet infrastructure is threatened by a bomber.

Nyssa believes that Malcolm killed Sara and goes after him to avenger her lover’s murder. Oliver discovers that he has no choice but to stop her, despite Laurel insisting that…

Oliver tries to track down Thea in Corto Maltese as Diggle searches for a missing field operative. Meanwhile, Felicity adapts to her new job.

The governor calls on Team Scorpion when his daughter is mysteriously “bio-hacked” with a deadly virus and only has 24 hours to live. The case takes on a deeper significance…

A mysterious archer known as Komodo appears in town and begins skewering businessmen. Meanwhile, Oliver worries about Thea, which forces Roy to tell him the truth about why she left…

With crime at an all time low, Oliver decides to take a break and asks Felicity on a date. However, they’re interrupted when a new drug dealer take the name…

When a crisis at LAX prevents dozens of airplanes from landing, the government brings in a group of misfit geniuses to sort things out.

Jaha makes a surprising move. Clarke gets help from an unexpected source. Lincoln seeks revenge.

Wick and Raven are faced with a setback. Maya and Jasper witness a terrible act.

Lexa and Clarke get into a heated discussion during battle preparations; Bellamy races against time.

Clarke begins to question Lexa’s leadership decisions and Indra continues to push Octavia. Meanwhile, at Mount Weather, Jasper steps up into the role of leader, and Cage throws Maya into…

Clarke is faced with a difficult choice and Raven helps Bellamy navigate Mount Weather as Dr. Tsing begins to harvest the 47, while Jaha and Murphy encounter a stranger on…

Lincoln and Bellamy’s efforts to get into Mount Weather has some brutal consequences.

Lives are left in danger following the arrival of a new threat. Lincoln and Bellamy decide to break into Mount Weather.

Things are anything but business as usual when Harvey and Mike find themselves at odds with a tenacious U.S. Attorney. Scottie and Harvey can’t seem to get on the same…

Lexa and Clarke manage to make a deal.The newly created alliance is under threat. Monty comes up with a plan.

Clarke comes back to Camp Jaha with some shocking news. Finn has to face the consequences of his actions.

Bellamy is able to get Clarke to agree to accompany him to the drop ship. Dr. Tsing is in charge of a deadly experiment.

A persistent attorney goes after one of Harvey’s clients; Mike is faced with a difficult decision; former name partner Charles Van Dyke returns with revenge on his mind.

Tensions are running high between Clarke and Finn. Raven finds out that Mount Weather is interfering with their communication systems.

Kane takes part in a mission to make peace with the Grounders. Jasper decides to take part in a risky experiment. Lincoln enters a world of pain and President Dante…

A major client demands that Harvey and Mike perform an unpleasant task; Louis faces a difficult challenge; Rachel collects an old debt.

Clarke ends up being betrayed by somebody that she trusted. Bellamy, Finn and Murphy attempt to save a stranger.

After discovering a horrifying project in Mount Weather’s medical ward, Clarke joins forces with an unexpected ally.

Harvey faces an old rival from law school; Jessica tries to stay out of Louis and Scottie’s feud.

Clarke wants answers from the President. Abby performs emergency surgery. Octavia will do anything to find Lincoln.

Clarke is still on her own in the white room, frantically attempting to make sense of her bizarre surroundings. Lincoln and Octavia’s plan is ruined and an enemy returns.