A former Superman as well as a former Supergirl are planning to converge on Smallville in season seven. Dean Cain, who played Clark Kent / Superman on the show Lois & Clark: The New Adventures of Superman will be guest starring in a nefarious role, while the big screens first Supergirl, Helen Slater, is being wooed to play new Supergirl Laura Vandervoort’s Kryptonian aunt.
Smallville has a history of bringing in actors associated with other adaptations of the Superman comic.