The CW has released a promo for episode 2.20 of "Arrow." Titled "Seeing Red," the episode is described as follows:
"The mirakuru sends Roy into an uncontrollable rage and he unleashes on the city. After Roy’s deadly fight with a police officer, Oliver realizes the mirakuru has taken over Roy completely and must figure out a way to stop him. Things get more complicated after Sara declares that Roy is too far gone and the only way to stop him is to kill him. Meanwhile, Thea believes she can breakthrough to Roy so she goes on camera at Moira’s campaign rally to lure him to Verdant. Her ploy works but after Roy attacks Thea, Team Arrow unleashes on him."
Directed by Doug Aarniokoski and written by Wendy Mericle & Beth Schwartz, "Seeing Red" is set to air on April 23. "Arrow" airs Wednesdays at 8 P.M. ET/PT on The CW.