Guest Stars Emily Bett Rickards as Felicity Smoak John Barrowman as Malcolm Merlyn Audrey Marie Anderson as Lyla Michaels Manu Bennett as Slade Wilson Celina Jade as Shado Roger Cross as Det. Lucas Hilton Christie Laing as Carly Diggle Seth Gabel as The Count / Count Vertigo Nelson Leis as Slim Darren Dolynski as Dr. Webb Co Starring Lee Jung Mi as TV News Reporter Kevin O'Grady as Security Guard Cassandra Ebner as Veronica Sparks Steven Jeays as Dance Partner Flux Pavilion as DJ Christian Sloan as Dealer Robyn Westcott as Maddie Julius Fair as Andy Jr. Justin Doran as Lieutenant Michael F. Roselli as Orderly