The President is tapped at the next Person of Interest, and the team finds itself receiving some unexpected help. Meanwhile, Finch goes on a roadtrip with the Machine to begin his final campaign against Samaritan.moreless
As Finch and Root go on a seemingly random series of errands to save the Machine against Samaritan's onslaught, Dominic threatens to shoot Harper and Elias unless Reese puts him in contact with Finch.moreless
The Machine sends the team two new Numbers: Elias and Dominic. Meanwhile, Finch and Root get a clue to Sam's whereabouts, and Control tries to learn the truth about Samaritan.
The team's new Number is Frankie Wells, a bounty hunter who refuses to give up on a target despite the threat to her life. Meanwhile, Finch links back up with Beth Bridges.
Reese and Finch protect a street-savvy grifter who makes the mistake of stealing laundered money from Dominic. Meanwhile, Root infiltrates a software app company on the Machine's behalf.
Gabe tries to woo Cat by taking her on a romantic date.
Bronze Tiger escapes from prison and goes after a prototype of Malcolm's earthquake machine. Meanwhile, Roy refuses to train with Arrow unless the vigilante reveals his true identity, Laurel is disbarred, and Thea tries to get Walter and Moira to reconcile.moreless
Cat attends her high school reunion and finds out more about her past. She's also threatened by a beast searching for Vincent. An old military pal with a dangerous secret meets up with Vincent.moreless
When they discover Malcolm's plan, Oliver and Diggle try to stop him but lose Felicity to a police arrest. Meanwhile, Thea learns that Roy is in danger and goes to The Glades, endangering herself as well, while Oliver risks what's left of his friendship with Tommy for the sake of honesty. In the past, Oliver, Shado, and Slade try to stop Fyers from bringing down a passenger jet.moreless
Daphne meets with Principle Rose and is told that Carlton will remain open but it will be consists of 50% hearing students. Toby and Nikki announce their engagement to John and Kathryn. Noah confirms to Bay about him having a connection with Daphne. Adriana tells Regina that Angelo called her and says he arranged for her to attend rehab. Bay drives Lana to a doctor's appointment and realizes that she is in labor. Nikki tells Toby she feels they might be rushing into marriage. Kathryn accompanies Bay to the hospital, and learns from Angelo that Lana and the baby took off.moreless
Nikki slips to Toby that she loves him. Melody tells Daphne to report the robbery to the police, leading to John and Kathryn asking Regina why weren't they told sooner. Bay hosts an anti-Valentine's Day get together inviting her hearing and deaf friends, and Angelo offers his apartment for the event and he and Lana will chaperone. Travis and Noah get into a heated confrontation.moreless
Daphne gets the truth from Travis's mother regarding his so called problems at home. Regina runs into an old friend while out with Kathryn. John sees an attack ad on his campaign involving his wife's radio interview. Toby brings Lana to the Kennish house for dinner and she lets something slip to an immigration social worker about carrying Angelo's baby.moreless
Melody takes action by taking her students on a tolerance retreat. Kathryn says something during an interview that could jeopardize John's campaign. Lana tells Toby she plans on putting her baby up for adoption. Regina receives bad news regarding her health.moreless
Oliver, his confidence undermined by his defeat at the hands of the Dark Archer, goes up against a psychologically traumatized firefighter. The man has started committing acts of arson while calling himself Firefly. Meanwhile, Thea tries to cheer her mother up and Tommy throws a benefit for the firefighters.moreless
Angelo tells Regina about the baby. Emmett makes a discovery about Nikki that could jeopardize her relationship with Toby
John and Kathryn consider running for public office. Bay is accused of cheating. Angelo starts spending his money on gifts.
When an off-duty officer is wounded by bank robbers calling themselves the Royal Flush Gang, Diggle tries to convince Oliver that he must do more than go after the men on his father's list. Meanwhile, Tommy asks Thea for dating advice and Moira demands to know why Oliver keeps disappearing.moreless
While juggling his relationship with Laurel, Oliver discovers that one of the men on his list has framed an innocent man. Meanwhile, Thea helps Oliver with Laurel, and Walter has an employee look into a withdrawal that Moira made from the company accounts.moreless
Oliver learns that he is not the only person in Star City that is flying under the radar of the police. An assassin named Deadshot is targeting businessmen bidding on an energy project, and Walter is one of the men involved. Oliver has no choice but to turn to Detective Lance for help to protect his family while he taken on the killer.moreless
The Kennish's head to Court. Meanwhile, Daphne is in trouble because of her relationship with Jeff.
A corrupt businessman, Martin Somers, hires a Chinese assassin named China White to eliminate Laurel for finding out too much. While protecting Laurel, Oliver is offered the chance to take back control of the company.moreless
While on vacation Oliver Queen's ship is destroyed in a storm and he is the only survivor. He finds himself trapped on an island for the next five years. Once he makes it back to Starling City he is reunited with his family and his former girlfriend, but they are unaware that he has changed... and has put the skills he learned to survive on the island to become the vigilante that the city needs.moreless