Arrow -- Image AR_2012_KH_1407 -- Pictured: Colin Salmon as Walter  -- Photo: Kharen Hill/The CW -- © 2012 The CW Network. All Rights Reserved

Arrow -- Image AR_2012_KH_1407 -- Pictured: Colin Salmon as Walter -- Photo: Kharen Hill/The CW -- © 2012 The CW Network. All Rights Reserved