Arrow Season 05, Episode 23 – “Lian Yu” : The battle between Oliver and Adrian Chase culminates in a final epic battle on Lian Yu, as Season 5 ends. Oliver recruits a group of unlikely allies, Slade, Nyssa, Merlyn and Digger Harkness, to defeat Chase. However, Chase has his own army that includes Black Siren, Evelyn Sharp and Talia al Ghul.
Arrow Season 05, Episode 22 – “Missing” : Black Siren returns to help Chase; Felicity organizes a birthday party for Oliver; Lance is furious after Rene misses the custody hearing for his daughter.
Arrow Season 05, Episode 21 – “Honor Thy Fathers” : Oliver returns to the mayor’s office and faces one of his most pressing issues yet, the forced release of dozens of violent criminals prosecuted by Adrian Chase. Meanwhile, a crate is delivered to Oliver’s office containing a mysterious corpse encased in concrete.
Arrow S05 E20 Underneath : Things get intense when Oliver and Felicity are trapped in the bunker together. Meanwhile, Lyla and Diggle deal with their martial issues.
Arrow Season 05, Episode 19 – “Dangerous Liaisons” : Oliver, Team Arrow, ARGUS and the SCPD kick off a citywide manhunt for Adrian Chase. Meanwhile, Helix tells Felicity they have a way to find Chase, but they will need something big and illegal from her in return.
Arrow Season 05, Episode 18 – “Disbanded”
Diggle and Felicity are shocked by Oliver’s decision to call on the Bratva to help take down Prometheus. Concerned the Bratva may overstep, Diggle has a hard conversation with Oliver about what happens if things go south. Meanwhile, Felicity learns something shocking at Helix.
Arrow S05 E17 Kapiushon : Prometheus goes to great lengths to break Oliver. Meanwhile, in the flashbacks, Anatoly becomes worried about Oliver’s increasingly violent tendencies, which come to a head in a brutal confrontation.
Season 05, Episode 16 – “Checkmate”
Oliver gets closer to the truth about Prometheus. Meanwhile, Helix refuses to continue helping Felicity until she does a favor for them.
Season 05, Episode 15 – “Fighting Fire With Fire”
Oliver faces his biggest challenge yet as mayor when Vigilante attacks him; Felicity continues down her dark path with Helix; Diggle leads the team in a mission to stop Vigilante once and for all.
Arrow S05 E14 The Sin-Eater : China White, Cupid and Liza Warner break out of Iron Heights and head to Star City for revenge. Oliver tries to bring in the newly formed girl gang but the ACU intervenes mid-fight. To his surprise, they are there to arrest the Green Arrow for the murder of Det. Malone. Meanwhile, Lance feels responsible for the prison break after Warner tells him she heard about him working with Damien Darhk.