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. This was a fantastic episode that aired right when I was seriously worried with the show. The episode was well written and directed and James Marsters and Allison Mack each did an especially good job in their roles as Braniac and Chloe Sullivan, respectively. This episode also had a lot of twists, which is great, and introduced a new type of kryptonite which I've never even heard of. All around, this was a great episode.