Seth gets some help from Alex to prove that his friends don't know him as well as they think. Meanwhile, Summer gives some thought to how she really feels about Seth after she learns new information about Zach. Marissa is happy to share an evening with Ryan. But at school, Ryan finds himself embarrassed and frustrated after a run-in with new classmate Lindsay. Caleb's legal problems threaten to leave both Sandy and Kirsten unemployed as Julie makes sure she stays on top even if Caleb goes down.