Gemini

"Gemini" is the second Christmas episode of , originally aired on The CW during the show's seventh season.

Synopsis
Clark and Lana team up to take down Lex. Clark and Lana discover, through an Isis Foundation patient, that Milton Fine is still alive. Adrian, one of Lex's experimental patients, plants a bomb on Chloe, threatening to kill her if Lois does not get Lex to admit that he is cloning humans. Lois confronts Lex, and, after Lois is knocked unconscious by Lex, it's revealed that the patient is a failed clone of Lex's brother Julian. Adrian also reveals that "Grant Gabriel" is the successful clone. Chloe, fearing that she will die, confesses to Jimmy that she was infected by the meteor rocks. In the end, it is revealed that Bizarro has been posing as Clark the entire time, unknown to anyone else, with Clark trapped at the Fortress of Solitude.