Watch Arrow Season 3 Episode 18 (S03E18) online

WATCH ARROW SEASON 3 EPISODE 18 ONLINE IN HD FREE

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During an attack on the mayor's office, Ray is critically injured. Felicity is pleasantly surprised when her mother, Donna Smoak, shows up at the hospital to offer her support. With the SCPD out in full force looking for the assailant, Oliver and his team work hard to stay one step ahead of the police to find the man responsible. However, things come to a head when Ra's al Ghul kidnaps Captain Lance.
It's celebration time as Diggle and Lyla get married. However, Deadshot interrupts their honeymoon and tells them the Suicide Squad has been given a new mission - rescue United States Senator Joseph Cray from a hostage situation in the Republic of Kasnia. Amanda Waller breaks down the mission and introduces them to the newest member of the Suicide Squad, Cupid. Meanwhile, Oliver learns about Ray's new Atom costume and the two have a heated stand-off. Felicity and Ray hit a rough patch.
Malcolm is captured by Ra’s al Ghul and taken to Nanda Parbat. Because of his love for Thea, Oliver considers saving Merlyn. Ray is obsessed with finishing his Atom suit so he can save the city but Felicity fears he is heading down the same path as Oliver and tries to pull him out of the lab.
Malcolm puts Oliver and Thea in a dangerous situation that lands them on Lian Yu with Oliver’s former enemy, Deathstroke. A flashback reveals when Oliver and Maseo returned to Starling City to retrieve the Omega bio weapon, and despite being under strict orders from Amanda Waller not to reveal himself to anyone, Oliver looks in on his family, Laurel and Tommy.
Still operating without Oliver and desperate to stop Brick, Team Arrow is forced to consider Malcolm’s offer to help shut Brick down as Malcolm has a personal score to settle with the felon. Roy and Laurel point out that the team could use some help to save the innocents of The Glades, but Felicity is adamantly against it. They look to Diggle to make the final decision. Meanwhile, the flashbacks chronicle Malcolm’s descent from kind-hearted father and husband to cold-blooded killer after the murder of his wife.
SUIT UP — Arsenal and Diggle confront Laurel about trying to step into her sister’s shoes and warn her to stop before she gets herself killed. However, when Brick kidnaps the city’s Aldermen and threatens to kill them all unless the police evacuate The Glades, it’s all suits on deck. Meanwhile, Ray steps in to help Lance and the police force fight Brick, showing Felicity a new side of her boss. Malcom tells Thea that Ra’s al Ghul is after him and his family and they must leave town immediately.
In the aftermath of Oliver’s fight with Ra’s al Ghul, Diggle and Arsenal continue to protect the city in the Arrow’s absence. However, after three days without hearing from Oliver, they begin to fear the worst may have happened to their friend. Felicity refuses to believe that Oliver could be dead until Merlyn pays the team a surprise visit. Thea suspects there is something more behind Oliver’s disappearance and asks Merlyn for a favor. Meanwhile, Ray tests a part of his new suit and Laurel takes up the mantle of the Black Canary.
Nyssa returns to Starling City and tells Oliver that her father, Ra's al Ghul has given Oliver 48 hours to find Sara's killer or the League of Assassins will start killing the citizens of Starling City. Laurel is stunned when her father delivers a very special Christmas gift - her mother, Dinah. Meanwhile, Ray tries to make amends with Felicity and Oliver sets a meeting with Ra's al Ghul.
PART TWO OF THE ARROW AND FLASH CROSSOVER EVENT - Oliver, Arsenal and Diggle track down the location of a boomerang-wielding killer named Digger Harkness but are surprised when they come face to face with an A.R.G.U.S. team. Diggle asks Lyla why A.R.G.U.S. is involved, but she defers until Harkness attacks the building, killing several agents and targeting Lyla. The Arrow joins the fight and gets help from an old friend - The Flash. Harkness manages to get away and Oliver teams up with Barry again to find him before he can get to Lyla. When Harkness plants five bombs in the city that are timed to explode at the same time, both teams must come together to save the city.
TED GRANT IS ACCUSED OF MURDER - After a body is found strung up in the Wildcat gym, Ted Grant becomes the main suspect. Oliver and Laurel argue over Ted's innocence. Meanwhile, in flashbacks, when Maseo needs Oliver to remember where an informant for China White stashed key information, he asks Tatsu to help jog Oliver's memory. Roy shares a secret with Felicity.
When a cyber attack brings Starling City to its knees, Oliver and Felicity are pushed to their limits to contain the destruction. Life gets even more complicated for Felicity when her mother, Donna, stops by for a surprise visit. Meanwhile, Ted Grant questions Laurel’s motives, and Thea buys an apartment with Malcolm’s “estate” money, which infuriates Oliver.
NYSSA RETURNS TO STARLING CITY AND RA’S AL GHUL MAKES HIS ENTRANCE — A furious Nyssa confronts Oliver about Sara. When Oliver learns Malcolm Merlyn is alive, he suspects Merlyn killed Sara. Oliver and Nyssa join forces and go after the Dark Archer, intent on bringing Sara’s killer to justice. Laurel keeps her distance from Nyssa, as she blames her sister’s death on her involvement with the League of Assassins. Meanwhile, Oliver and Roy work on repairing their respective relationships with Thea, who has returned home. Nyssa discusses Oliver with her father, Ra’s al Ghul.
OLIVER SEARCHES FOR THEA IN CORTO MALTESE WHILE DIGGLE TRACKS A.R.G.U.S. AGENT MARK SHAW — Oliver decides it’s time for Thea to come back to Starling City, so he packs for Corto Maltese, where Felicity has traced Thea’s whereabouts. Lyla asks Diggle to go with Oliver because one of her field operatives, Mark Shaw, has gone dark in Corto Maltese and she’d like him to look into it. Feeling responsible for Thea’s departure, Roy joins Oliver and Diggle on their journey. Shaw double-crosses Diggle, putting numerous A.R.G.U.S. agents, including Lyla, at risk. Meanwhile, Laurel meets Ted Grant, and Felicity adjusts to her new job.
Lance calls the Arrow when another archer appears in town and starts skewering businessmen. Diggle uses A.R.G.U.S. to find the archer’s identity; he is a man named Simon Lacroix, who goes by the codename Komodo. However, the team hits a rough patch with the mission and gets help from a surprising source – Laurel. Meanwhile, Oliver begins to worry that he hasn’t heard from Thea, which forces Roy to tell him the truth about why she left town. Ray Palmer pursues Felicity. In the flashback, Maseo tells Oliver that Amanda Waller has ordered his first kill. As Oliver looks down the scope of the rifle, he sees the target is his best friend, Tommy. Despite her promise to her sister, Laurel debates sharing a secret about Sara with Lance.
OLIVER SEARCHES FOR AN IDENTITY BEYOND THE ARROW — With crime in Starling City at an all-time low thanks to the Arrow and his team, Oliver thinks he can finally balance being both the Arrow and Oliver Queen and asks Felicity out on a date. However, when a new villain emerges, who has claimed the name Vertigo from the recently deceased Count, Oliver is caught off-guard and someone close to him is hurt. Oliver and a newly suited up Roy take on the Count. Meanwhile, Diggle becomes a father, Lance is promoted to Captain, Laurel joins Arrow’s inner circle and Felicity gets a part-time job at a tech store to make ends meet. Also, Oliver fights to regain his company, Queen Consolidated, but comes up against a very worthy opponent – the charming Ray Palmer.
OLIVER MUST DECIDE ONCE AND FOR ALL IF HE’S A KILLER OR A HERO — Slade moves forward with his plan to kill one more person in Oliver’s life. While Oliver has fought all year to be more than the killer he once was, when Slade kidnaps someone close to Oliver’s heart, Oliver is pushed to the edge and realizes sometimes it takes doing the unthinkable to stop the monster. Meanwhile, Diggle takes on Amanda Waller with a little help from some friends, and Thea turns to Roy in her time of need.
Oliver rallies his team as Slade’s soldiers attack the city. Felicity gets a call from S.T.A.R. Labs with game-changing news and Thea comes face-to-face with her father – Malcolm Merlyn.
After Slade threatens to take everything Oliver loves away, Oliver decides the fastest way to stop further bloodshed is to surrender to his enemy. Knowing that surrender will surely lead to Oliver's death, Diggle and Felicity go to extreme measures to keep Oliver from confronting Slade. Meanwhile, Thea considers leaving town, and Laurel resumes her crusade against Sebastian Blood. Finally, Slade unleashes his assault on Starling City.
ROY SPINS OUT OF CONTROL — The mirakuru sends Roy into an uncontrollable rage and he unleashes on the city. After Roy’s deadly fight with a police officer, Oliver realizes the mirakuru has taken over Roy completely and must figure out a way to stop him. Things get more complicated after Sara declares that Roy is too far gone and the only way to stop him is to kill him. Meanwhile, Thea believes she can breakthrough to Roy so she goes on camera at Moira’s campaign rally to lure him to Verdant. Her ploy works but after Roy attacks Thea, Team Arrow unleashes on him.
DEATHSTROKE HITS OLIVER AT HOME - Oliver, Canary, Diggle and Felicity return to the lair and find Slade waiting for them. An epic battle breaks out and one member of Team Arrow is sent to the hospital. Thea hits her breaking point, but just as Oliver is about to reach her, Slade intervenes and Oliver is faced with a choice – his battle with Slade or his family. Meanwhile, Laurel struggles with a new secret.
Slade makes his move against Oliver and the repercussions are enormous. While Oliver scrambles to protect his family, a key player in his team starts to question Oliver’s decisions. Meanwhile, Isabel makes her move to take Queen Consolidated away from Oliver.
When Frank Bertinelli is arrested, Oliver knows it’s only a matter of time before his daughter, Helena, AKA The Huntress, returns to town. To make matters worse, Laurel is picked to try Frank’s case, putting her right in the path of Helena. Oliver tells Sara he will handle his ex-girlfriend, but when Helena takes hostages at the courthouse, including Laurel, the Canary will stop at nothing to save her sister. When The Huntress and Canary meet, an epic battle begins. Meanwhile, Roy realizes he needs to keep Thea safe, but doesn’t like the way he is forced to go about it.