Original air date: 10/07/2015 Runtime: 42:29 min. In the season four premiere episode, Oliver and Felicity’s blissful getaway is cut short when Thea and Laurel pay them a visit and tell Oliver they need his help back in Star City. The city has been attacked by “Ghosts” – assassins led by a dangerous man named Damien Darhk (new series regular NEAL MCDONOUGH). When Oliver returns, however, Diggle makes it very clear that he doesn’t want Oliver on the team.
Original air date: 12/01/2015 Runtime: 43:16 min. In its second major crossover event with Arrow, Vandal Savage (guest star CASPER CRUMP) arrives in Central City and sets his sights on Kendra Saunders. After Vandal attacks Kendra and Cisco, they turn to Barry for help. Realizing how dangerous Vandal is, Barry takes Kendra to Star City and asks Oliver and the team to hide her until he can figure out how to stop Vandal. However, things quickly go from bad to worse when a man with wings AKA Hawkman (guest star FALK HENTSCHEL) shows up and flies off with Kendra.
Original air date: 02/03/2016 Runtime: 42:29 min. The team faces off against a formidable villain nicknamed The Calculator (guest star TOM AMANDES). Meanwhile, Nyssa (recurring guest star KATRINA LAW) makes her move and Roy Harper (former series star COLTON HAYNES) returns to Star City.
Original air date: 03/23/2016 Runtime: 42:24 min. A heartbroken Cupid (recurring guest star AMY GUMENICK) returns to wreak havoc on Star City with one goal – to destroy anyone in love. When the team learns that she’s targeting couples on their wedding day, the recently broken up Oliver and Felicity decide to pose as bait with a fake wedding.
Original air date: 03/30/2016 Runtime: 42:16 min. Brie Larvan aka the Bug-Eyed Bandit (returning guest star EMILY KINNEY) breaks out of jail and turns up at Palmer Tech threatening to kill everyone unless she gets the biochip that is implanted in Felicity’s spine. When Oliver realizes that Felicity, Thea and Donna are trapped in Palmer Tech with everyone else, he looks to a surprising ally to help Team Arrow save the day.
Original air date: 04/27/2016 Runtime: 41:29 min. Oliver and the team struggle to come to terms with Laurel’s death, especially Diggle who is overwhelmed with guilt for choosing to believe Andy had changed. Meanwhile, Lance refuses to believe his daughter is really gone and asks Nyssa al Ghul to help bring her back. A recent Black Canary sighting in Star City only seems to prove his theory that Laurel isn’t actually dead.
Original air date: 05/04/2016 Runtime: 41:48 min. As Oliver and Felicity look for a magical solution to defeat Darhk, a vengeance-driven Diggle gets a lead on Andy’s whereabouts and heads off to confront his brother. Meanwhile, Alex (guest star Parker Young) takes Thea on a vacation that quickly turns into a nightmare.