The Battle of the Immortals is here!

Dr. Curtis Knox, a famous neurosurgeon, is introduced this week as an immortal man curing the meteor-infected. But Curtis seems to have his own agenda: taking the organs of certain patients in order to make his wife immortal. Before Chloe even does any research, she decides to ditch Jimmy to go get the cure from Dr. Knox. Clark sets out to stop her...with Lex's help?! Lana makes herself at home (gross) by continuing her web of lies. Martian Manhunter and Kara finally meet again at the House of Kent.

Dean Cain (Lois & Clark: The New Adventures of Superman) special guest stars as Doctor Curtis Knox, a character originally intended to be Smallville's version of DC Comics original character Vandal Savage.

Phil Morris returns for another special guest appearance as DC Comics original character John Jones ("J'onn J'onzz"), a.k.a Martian Manhunter.

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