Last week on Arrow, Oliver (Stephen Amell) watched as Thea (Willa Holland) was arrested for having the club drug Vertigo in her system at the time of her accident. This week, the vigilante wants to bring down the man responsible for the drug.

In “Vertigo,” Seth Gabel (Fringe) guest stars as the dealer, known simply as “The Count.” While Laurel (Katie Cassidy) sets out to defend Thea, Oliver turns to a different former flame for her. McKenna Hall (guest star Janina Gavankar) is a vice cop who is also looking for the mystery drug dealer.

But what happens when Oliver finds The Count? Check out the video below to see the villain in action.

Arrow airs Wednesday, Jan. 30 at 8 p.m. on The CW.