John Glover ( born August 7, 1944) is an American actor, known for a range of villainous roles in films and television, such as Lionel Luthor in Smallville, Dr. Jason Woodrue in Batman & Robin and the voice of Riddler in the DC Animated Universe. He also played the role of Daniel Clamp in Gremlins 2: The New Batch (1990). (Via Wikipedia)