The CW has released the official synopsis for “Brotherhood,” the forthcoming seventh episode of Arrow’s fourth season.

“Brotherhood” — (8:00-9:00 p.m. ET) (TV-14, LV) (HDTV)

JAMES BAMFORD DIRECTS — Team Green Arrow’s ongoing battle with Damien Darhk (Neal McDonough) is complicated by a shocking revelation. Thea’s (Willa Holland) bloodlust returns and she loses control in front of Alex (guest star Parker Young). James Bamford directed the episode written by Speed Weed & Keto Shimizu (#407).

Original airdate 11/18/2015.