Chicago Med is inundated with the victims of shooting at a movie theater, the shooter and the hero. Dr. Rhodes gets irritated by the general consensus that he should not try too hard to save the shooter's life, a teenage boy. Sharon Goodwin must manage the press and the internal dynamics of the situation. Dr. Manning treats a teenage girl, Ashley, for nausea and feels that there is concerns to consult Dr. Charles for a possible eating disorder. Dr. Charles employs an unusual method which raises concerns with both Dr. Manning and the patient's mother. Dr. Choi is asked to consult on a case involving a elderly woman who makes very racist statements.moreless
When Dr. Rhodes treats a man who was impaled, he reunites with his estranged sister, Claire and takes a look at his past. Dr. Halstead treats a young musician who needs surgery but it could cost her the ability to hear.moreless
Dr. Choi must put his personal feelings aside when treating a teenage mother who abandoned her newborn baby in an alley. Dr. Manning treats the abandoned baby and clashes with Dr. Choi about the mother. Dr. Charles assists Sarah Reeves in treating an elderly woman diagnosed with Dementia.moreless
The new team of doctors have a hand full when there's a train accident.
Malcolm engineers Slade's escape to train Oliver and Thea in how to survive. Meanwhile, five years ago Amanda brings Oliver and Maseo to Starling City to recover the Omega bio weapon, and Oliver must decide whether to stop China White or stay with his friends and family who are falling apart without him.moreless
Religious motives are suspected in a couple's murder. Meanwhile, Laura and Jake look for a new nanny and encounter a familiar face in their search.
Oliver and his team look for Sara's killer and the trail leads to an assassin, Komodo, who is methodically eliminating his targets. While they hunt down the killer, Roy tells Oliver why Thea isn't returning his phone calls. In the past, Maseo informs Oliver that he has to kill Tommy Merlyn.moreless
Root intersects with the team again when the Machine gives Finch the Number of a janitor after it sends Root to investigate the man.
After a battle with Cyrus Gold, Oliver is poisoned and left for dead, and Felicity gives him an antidote that causes hallucinations of his past. Meanwhile, Brother Blood captures Roy, Barry continues assisting Felicity, and Lance loses someone when he tries to run surveillance on Cyrus.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
The Dark Archer visits a seismologist to further The Undertaking. Meanwhile, Laurel makes a decision after Tommy tells her the truth, and Roy and Thea try to find The Hood. In flashback, Fyers tells the captive Oliver, Shado, and Slade of his plans for the missiles and for Yao Fei.moreless
Left with no one but Felicity to rely on, Oliver goes after an accountant and gets a lead on Walter's whereabouts. With Diggle out of his life, Oliver turns to Felicity for help in the field. Meanwhile, Tommy tells Laurel the truth about what he's doing, and Malcolm remembers working with Robert Queen and Frank Chen to alter The Glades forever after the death of his wife.moreless
Oliver and his team go after Deadshot, only to discover that ARGUS plans to capture the assassin... and recruit him as an operative. Meanwhile, Roy seeks out The Hood while Laurel inadvertently drives a further wedge between Oliver and Tommy. And on the island, Shado teaches Oliver how to use the bow.moreless
A woman at Oliver's club dies of Vertigo and Oliver confirms that The Count is apparently not responsible. However, when The Count escapes, Oliver sets out to bring him in and finds out who is really responsible for the drug distribution. Meanwhile, Quentin gets a lead that takes him to Tommy as the suspected distributor, and Tommy has to take extreme measures to prove his innocence. Meanwhile, on the island, Oliver continues his studies with Slade and Shado.moreless
A new vigilante, The Savior, stalks The Glades, killing those that he believes have wronged the residents and broadcasting their deaths online. When The Savior explains that he was inspired by The Hood, Oliver sets out to stop him. Meanwhile, Quentin comes to accept that Dinah is telling the truth and Sarah is still alive, but Laurel isn't so sure.moreless
Oliver's life is going smoothly for once... until the Huntress returns to town. Meanwhile, Thea gets Roy Harper at job at the new club just in time for its opening night, and Laurel and Quentin try to come to grips with Dinah's return.moreless
Deadshot is back and working with China White to kill Malcolm Merlyn. While Oliver goes after the two assassins, he struggles to help Tommy resolve his issues with his father and navigate a new relationship with old girlfriend McKenna.moreless
Infamous criminal Cyrus Vanch plans to take on The Hood to reestablish his reputation as Starling City's leading crime lord. Meanwhile, Oliver confronts his mother over the copy of the list that Walter found, and Quentin unintentionally endangers Laurel.moreless
Oliver hunts down a drug dealer known as "The Count" to prevent the distribution of a new drug known as Vertigo... after Thea has been arrested for using it. While Oliver turns to a former girlfriend and current vice cop for help, Moira defends Thea and Felicity learns more about Moira.moreless
Oliver and Diggle are at odds when Diggle's former commanding officer is next on the list. Meanwhile, Thea notices when Moira and Malcolm spend time together, while Tommy and Laurel have dinner with Tommy's father.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
When he discovers that Moira and Thea stopped celebrating Christmas since his disappearance, Oliver tries to throw a Queen Christmas party. Meanwhile, Tommy and Laurel disagree on how they should spend Christmas together.moreless
Oliver takes Helena under his wing and trains her in the life of a street vigilante. However, Diggle has concerns about Helena, concerns that soon prove true when Helena kills the head of the Triad and puts herself and Oliver at risk.moreless