“Supergirl” is going to introduce one of DC Comics’ greatest villains this season: Lex Luthor. The CW announced Thursday that the show will be adding the character this season in a recurring role, though he will not appear in the network’s upcoming “Elseworlds” crossover between “Supergirl,” “Arrow” and “The Flash.” Casting will begin shortly for the role. Read the full article on The Wrap