Smallville :

After receiving a photograph of herself dressing in her room, Lana realizes that she has a stalker. No matter where she goes they continue to find her, leaving her gifts and death threats. Lana begins to fear for her safety. For safety, she stays with Martha, and uses the opportunity to learn more about Clark. When she returns to the mansion, Lana is surprised to learn the true identity of the stalker.

Meanwhile, Jimmy breaks up with Chloe, believing that she isn't truly over Clark. Chloe is forced to take a hard look at her feelings for her best friend.