Guest Stars John Barrowman as Malcolm Merlyn Caity Lotz as Sara Lance Celina Jade as Shado Grant Gustin as Barry Allen Kevin Alejandro as Sebastian Blood Dylan Neal as Dr. Anthony Ivo Bex Taylor-Klaus as Cindy "Sin" Simone Summer Glau as Isabel Rochev Jesse Hutch as Officer Daily Graham Shiels as Brother Cyrus Gold Co Starring Keri Adams as Bethany Snow Lee Vincent as Kelton Jennifer Cheon as Officer Jones Bill Croft as Grizzled Man Jordan Schartner as Carl Alec Burden as Attendant Sheldon Trosko as Guard