Joanna Marie "Jo" Polniaczek was played by Nancy McKeon. Jo was first introduced in 1980, arriving at the Eastland Academy on her motorcycle. Her age throughout the series was roughly 15 to 23.
She almost immediately formed a dislike for Blair Warner; Jo found Blair stuck-up, and Blair found Jo classless and manly. In a memorable introduction, Blair introduced herself to Jo, to which Jo replied, "Charmed; I`m Gloria Vanderbilt."
Jo convinced the gang to steal the school van and use fake IDs to buy drinks at a bar. The van was wrecked and the girls were forced to work in the Eastland cafeteria to make up the repair costs. The girls were also placed on house probation and were forced to live in a room adjoining Mrs. Garrett`s for a year; when th...