"Brotherhood" is the seventh episode of the fourth season of , and the seventy-sixth episode overall. It aired on November 18, 2015.
|Team Arrow's ongoing battle with Damien Darhk is complicated by a shocking revelation. Thea's bloodlust returns and she loses control in front of Alex.|
While Ray won't come back to Palmer Tech, H.I.V.E. annihilates cash implied for the city bank. John gives Oliver data that H.I.V.E. killed his sibling Andy since he was a criminal opponent. Darhk enlightens Quentin regarding his insight into Quentin's selling out. The group heads to a lab, where they are assaulted by Darhk's gathering and John finds that Andy is as yet alive, working for H.I.V.E. John won't consider Andy to be anything over a backstabber, disgraceful of sparing. The group discovers that Darhk utilizes pills to control his agents' psyches, which could have been controlled to Andy. They find him and the remainder of H.I.V.E., effectively extricating Andy with assistance from Ray and John, who faces Andy with the reports, which Andy affirms. After an experience with Darhk, Thea discovers that his forces may help fix her bloodlust for all time after Darhk's inability to deplete her lifeforce. In flashbacks, Conklin uncovers that the specialist Oliver executed was Vald, Taiana's sibling, anyway Oliver occupies the allegation, contending that Conklin set Vald to slaughter him. Reiter finds reality by utilizing a supernatural article and has Oliver whip Conklin as discipline. Oliver later persuades Taiana to assist him with finding a guide.
- Stephen Amell as Oliver Queen/Green Arrow
- Katie Cassidy as Laurel Lance/Black Canary
- David Ramsey as John Diggle
- Willa Holland as Thea Queen/Speedy
- Emily Bett Rickards as Felicity Smoak
- John Barrowman as Malcolm Merlyn
- Paul Blackthorne as Quentin Lance
Special appearance by
Special guest star
- Audrey Marie Anderson as Lyla Michaels
- Eugene Byrd as Andy Diggle
- Jimmy Akingbola as Baron Reiter
- Ryan Robbins as Conklin
- Elysia Rotaru as Taiana Venediktov
- Parker Young as Alex Davis
- Damien Darhk addresses Thea as "Merida". This is a reference to the Disney Princess/Pixar character Merida, who also uses a bow and arrow.
- This is the second time Merida has been referenced on , after the Season 1 episode "".
- This episode marks the last appearance of Ray Palmer on until "".
- Arrow fight choreographer James Bamford makes his directional debut.
- In this episode, Andy Diggle is said to be dead for 8 years, but it's actually been not more than 6 years, since he was last seen alive in Season 3's "" in a flashback at Tommy Merlyn's party.
Preparation ran from September 10 until September 18, 2015. Shooting ran from September 21 until October 1, 2015.
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