Smallville: Season 5, Episode 7

5 - 7: Splinter

Clark is exposed to silver kryptonite, causing him to have paranoid delusions. The silver kryptonite makes him believe that Chloe is going to reveal his secret, Jonathan is scheming against him with Lionel and Lex and Lana are having a secret relationship. Chloe and the Kents frantically search for a cure, but it is Professor Fine who comes to Clark's rescue - but not without an agenda...