Lizzie finds out in square-dancing class that a guy has a crush on her--but it's Larry Tudgeman! She asks her mom's advice about how to get rid of him, but Mom suggests she find out what he's all about first, intimating that her dad was kind of a geek when she first met him. This isn't what Lizzie wants to hear, but she doesn't want to be mean and consents to go out with Larry. To her surprise, he shows up for the date looking very nice, and--bigger surprise--she actually has fun on their trip to the science museum.
