Lionel Luthor (John Glover) finds himself in a game of life-and-death when a masked perpetrator traps him in riddles and puzzles. Is it someone from Lionel’s past? He initially suspects Lex (Michael Rosenbaum) but who is it really? Mercy was written by Steven S. DeKnight and it debuted on 20 April, 2006. Lionel tries to…