Smallville: Season 7, Episode 9

7 - 9: Gemini

After confirming that Kara has disappeared, Clark suggests to Lana that they team up to take down Lex together. Meanwhile, a man associated with Lex has secretly planted a bomb on Chloe. He tells Lois that she needs to get the information he needs to prove that Lex is conducting experiments, or he will kill her cousin.