Guest Stars John Barrowman as Malcolm Merlyn Colin Salmon as Walter Steele Byron Mann as Yao Fei Gulong Sebastian Dunn as Edward Fyers Brian Markinson as Adam Hunt Co Starring Jeffrey C. Robinson as Deathstroke Mark Ghanimé as Dr. Douglas Miller Philip Prajoux as Bomb Squad Officer Lisa Marie DiGiacinto as Attractive Woman Scott Lyster as Shane Colvin David Milchard as Nelson Ravich Ryan Younglao as Delivery Clerk Elizabeth Weinstein as Female Hostage Paul Boyle as Elite Man Uncredited Emily Bett Rickards as Felicity Smoak