Clark discovers red kryptonite's evil power over him when the school unknowingly uses it in the class rings, and Lana finds herself drawn to the `new' Clark.
A kidnapped woman misdials a mobile phone number and begs for help, and the team must figure out the number and person she was trying to call.
Piper and Phoebe devise a plan to recover Leo; Paige rescues her new charge from a Darklighter; Billie is forced to make an important decision.
Cory tries to maintain a friendship with Angela when she and Shawn split up.
An old tape of Ashley and Aiden surfaces; Clay and Chelsea come to a decision about their future.