Arrow Season 1 Episode 19
A young woman who dies after an apparent drug overdose of Vertigo made a call to Tommy just before she died, and Quentin believes that he had something to do with her death. Meanwhile,Oliver tries to confirm whether The Count is behind the resurgence of Vertigo in Starling City. Meanwhile, in flashbacks, Shado puts Oliver through an unusual training exercise.
Director: Michael Offer
Episode Title: Unfinished Business
Air Date: 2013-04-03