Carl Winston Lumbly (born August 14, 1951) is an American actor. He is known for his roles as television's first black superhero in M.A.N.T.I.S., Dick Hallorann in Doctor Sleep, NYPD detective Marcus Petrie on the CBS police drama Cagney & Lacey, CIA agent Marcus Dixon on the ABC espionage drama series Alias, and as the voice of J'onn J'onnz / Martian Manhunter in the animated series Justice League, Static Shock, and Justice League Unlimited, all part of the DC Animated Universe. As a reference ...