"My brother needed me, the green one."
—Diggle seeing Oliver as his brother over Andy
"Brotherhood" is the seventh episode of the fourth season of Arrow, and the seventy-sixth episode overall. It aired on November 18, 2015.


Team Green 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.[1]


  • Damien Darhk addresses Thea as Merida. This is a possible reference to Princess Merida (who also uses a bow and arrow) in the Disney/Pixar film Brave.
  • This episode marks the last appearance of Ray Palmer on Arrow until Invasion!.


Preparation ran from September 10 until September 18, 2015. Shooting ran from September 21 until October 1, 2015.[2]


  1. Arrow #4.7 “Brotherhood” Description: James Bamford Directs! - GreenArrowTV
  2. Marc Guggenheim (@mguggenheim) - Twitter