Elysia Rotaru

In the season four finale, Oliver teams up with a surprising force in an attempt to stop Damien Darhk and his magic once and for all.

Team Green Arrow's ongoing battle with Damien Darhk is complicated by a shocking revelation. Meanwhile, Thea's bloodlust returns and she loses control in front of Alex (guest star Parker Young).

After the city is attacked again, Oliver makes a bold move against HIVE. Malcolm checks in on Thea and leaves her with a warning. Things take a horrible turn when 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 Darhk.

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.

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