Oliver expects the Huntress (Jessica De Gouw) to return once her father (Jeffrey Nordling) is arrested; Laurel is involved in a hostage situation at the courthouse; Roy tries to keep Thea safe.

Oliver prepares for battle with his former friend Slade; Amanda recruits Diggle to stop a warlord, but he is surprised when he meets the rest of the team she has assembled.

Oliver is stunned when he discovers that Slade is in Starling City; back on the island, Sara and Oliver form a plan to deal with Slade's growing Mirakuru-induced rage.

Felicity feels left out when Oliver makes Sara a part of the team; a brilliant thief known as The Clock King arms himself with technology that can open bank vaults; Laurel refuses to attend a party for Sara.

Lance and Oliver try to talk Sara into reuniting with Laurel, who continues to unravel; Dinah is kidnapped.

Arrow offers to train Roy, but Roy refuses unless Arrow reveals his true identity; Malcolm's earthquake machine is stolen by the Bronze Tiger; Laurel spins out of control after she is disbarred.

Oliver feels conflicted when Laurel asks the Arrow for help investigating Sebastian Blood; Sin wants Roy to test his new super-strength.

Arrow tries to stop a man from setting off a bomb at a rally but gets trapped in the process; Thea witnesses Roy's superstrength and demands answers.

Oliver is drugged and left for dead after a fight with Cyrus Gold; Felicity and Barry grow closer; Brother Blood captures Roy.

Central City police scientist Barry Allan investigates a seemingly impossible robbery; Sin turns to Roy for help when a friend goes missing.

A mysterious illness impacts hundreds of people in the city, including Diggle; Oliver realizes The Count (Seth Gabel) has escaped from prison.

Wild Dog defies the Green Arrow's orders by taking it upon himself to go after drug dealer Garret Runnels, who is terrorizing Star City.

Oliver assembles a group of unlikely allies - Slade, Nyssa, Merlyn and Digger Harkness - to engage in an epic battle against Chase and his army.

Black Siren returns to help Chase; Felicity organizes a birthday party for Oliver; Lance is furious when Rene misses the custody hearing for his daughter.

Oliver faces the forced release of dozens of violent criminals prosecuted by Adrian Chase; a crate arrives at Oliver's office containing a mysterious corpse encased in concrete.

The situation gets intense when Oliver and Felicity are trapped in the bunker together; Lyla and Diggle deal with their martial issues.

Oliver, Team Arrow, ARGUS and the SCPD kick off a citywide manhunt for Adrian Chase; Felicity needs to deliver something illegal that will entice Helix to go after Chase.

Oliver's decision to call the Bratva for help taking down Prometheus surpises Diggle and Felicity; Felicity makes a shocking discovery at Helix.

Oliver and Thea are concerned when a family friend plans to run for mayor; Thea starts to exhibit side effects from the Lazarus Pit; Felicity asks an employee for help with a business decision.

Prometheus attempts to break Oliver; Anatoly worries about Oliver's increasingly violent tendencies, which come to a head in a brutal confrontation.

Oliver gets closer to the truth about Prometheus; Helix refuses to continue helping Felicity until she does a favor for them.

James Gordon is a rising detective in the dangerously corrupt Gotham City, where his late father was a successful district attorney. Brave, honest and determined to prove himself, Gordon must navigate the dirty politics of Gotham's justice system as well as the rise of malevolent villains like The Penguin, The Riddler and Catwoman. The series also chronicles the life of young Bruce Wayne, who becomes an orphan when his billionaire parents Thomas and Martha Wayne are murdered. Gordon becomes a friend to young Bruce as he finds his way toward becoming the iconic caped crusader.