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Involved in an accident at Luthercorp, Chloe (Allison Mack) accidentally inhales crypto-gas. As a result, everyone who comes in contact with Chloe is uncontrollably compelled to the truth, the whole truth, and nothing but the truth. Armed with her newfound powers, Chloe hopes to finally get all the facts about Clark (Tom Welling) from the Kents -- but in this case, the truth may prove fatal, especially since Lionel Luthor (John Glover) is bound and determined to exploit Chloe's "gift" for his own gain.