Deathstroke (Manu Bennett) launches his attack on Starling City as Thea's father Malcolm Merlyn (guest star John Barrowman) returns in the first promo for Arrow's penultimate Season 2 episode, "Streets of Fire", airing Wednesday, May 7th at 8 PM ET on The CW. Watch as Oliver Queen (Stephen Amell) tries to save a city under siege in the second-to-last episode of the season, which also features a brief glimpse at Summer Glau as Isabel Rochev.

Oliver rallies his team as Slade's soldiers attack the city. Felicity gets a call from S.T.A.R. Labs with game-changing news and Thea comes face-to-face with her father - Malcolm Merlyn (guest star John Barrowman).