When "Smallville" returns to screen in 2011, fans will be able to see some familiar faces such as Lionel Luthor, Chloe Sullivan and Martha Kent. While Lionel had appeared in an episode earlier this season, this would mark the big return of Allison Mack who quit the show in May, as well as Annett O'Toole's.
"Collateral" kicks off the last 11 episodes of Clark Kent's story before he is recognized as Superman. At the 2010 San Diego Comic Con, it was mentioned that Mack would be back in at least 5 episodes. Meanwhile, Lionel had said previously that he wanted to see how this ends, sparking speculation that he's going to appear in the finale.
To Read More Click Here.