Fred Bitters was a guest character in the episode, "Attack of the 50 Inch Girl". In that episode, she is a new student at the school, and quickly began to pick on and bully Scott to the point he no longer wanted to go to school. In his absence, she began bullying Leonard instead. In the end, Fred admits she bullies due to the fact her father's job forces her to move often and make new friends all over again. Leonard and Scott comfort and forgive her by saying they'd like to be her friends. However, Fred is terrified at the prospect of being friends with them, and runs away yelling. She does not appear again in the series, presumably running herself out of town. She is voiced by Nancy Cartwright, famous for voicing Bart Simpson on The Simpsons.