BEVERLY HILLS, Calif. (AP) — Matt Ryan is resuming his role on the short-lived NBC series "Constantine," for an upcoming episode of "Arrow," The CW network announced Tuesday.Both series are a part of the DC Comics universe and were produced by Warner Bros. Television."Arrow" stars Stephen Amell as Oliver Queen, who moonlights as a hooded hero who uses a bow and arrow to protect his city from villains.Ryan plays John Constantine a former con man-turned supernatural detective.A press release from The CW said Constantine will "provide critical support to Oliver when arrows aren't enough.""Arrow" returns for its fourth season on The CW on Oct.7 at 8 p.m.