Arrow: Season 4

A new enemy lures Oliver Queen back to Starling City and forces him to put on the hood once more.

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.

The growing tension between Oliver and Diggle puts both their lives at risk when they go after Damien Darhk and a H.I.V.E. deployed meta-human. Meanwhile, Laurel talks Thea into returning to Nanda Parbat to ask her father to put Sara into the Lazarus Pit. However, Laurel is surprised when Nyssa refuses to do it.

Laurel must deal with the repercussions of taking Sara to Nanda Parbat. Meanwhile, Oliver asks Captain Lance for a favor and while he's not surprised at the response, he is surprised at what he finds out next.

When things take a turn for the worse with Sara, Oliver calls in a favor from an old friend who deals in the mystical, John Constantine.

Felicity is frantic when she learns that Ray is alive and being held by Damien Darhk. Felicity's guilt over not finding Ray sooner causes tension between her and Oliver.

A shocking revelation complicates the battle between Team Arrow and Damien Darhk; Thea loses control in front of Alex.

Oliver and Barry hide Kendra Saunders and Carter Hall in a remote location while they figure out how to defeat Vandal Savage.

After the city is attacked again, Oliver makes a bold move against HIVE, but Damien Darhk retaliates in a brutal manner at Oliver's mayoral holiday party.

Oliver must deal with the devastating consequences of Darhk's last attack. Seeking revenge, Oliver goes on a brutal manhunt looking for Dahrk.

An agent of Shadowspire who was an enemy from Diggle and Andy's wartime past shows up to Star City. Diggle must learn to trust Andy but he got more than he wanted about their shared time from war. Oliver however must learn a new way of life when Felicity is now in a wheelchair and receives her codename.

The team faces off against a formidable villain nicknamed The Calculator (guest star Tom Amandes). Meanwhile, Nyssa (guest star Katrina Law) makes her move and Roy Harper (guest star Colton Haynes) returns to Star City.

Oliver receives an offer from Nyssa that is hard to refuse, Meanwhile Thea continues to battle the bloodlust Malcolm steps in to help his daughter, and Laurel has a Heart to Heart talk with Nyssa.

Team Arrow uncovers HIVE's plan to take them out for good, leading Lance to wonder if Donna is better off without him and Oliver to consider telling Felicity about his son.

Oliver calls in his old friend Vixen for help in fighting Darhk, while Thea has a heart-to-heart talk with Malcolm.

Following the events of William's kidnapping, Darhk has become less powerful, but Carrie Cutter, a.k.a. Cupid, has emerged into Star City to cause chaos on the city and the Green Arrow.

The Bug-Eyed Bandit escapes from jail and turns up at Palmer Tech threatening to kill everyone in the building unless she gets the bio-chip that was implanted in Felicity's spine.

Oliver and Diggle find out Merlyn wants to break Darhk out of prison; Laurel gets a surprise offer.

Oliver and the team struggle to come to terms with a friend's death, especially Diggle, who is overwhelmed with guilt for choosing to believe Andy had changed.

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 takes Thea on a vacation that quickly turns into a nightmare.

When Team Arrow learns what Damien Darhk's next move is, Felicity realizes she needs to ask her father, Noah Kuttler, for help. Noah and Oliver have a heart to heart talk that leaves Oliver rattled.

Following the shocking events in the previous episode, Oliver and Diggle race to rescue Thea, while Felicity, Curtis and Noah join together to stop Darhk.

Oliver teams up with a surprising force in an attempt to stop Damien Darhk and his magic once and for all.