Ep 21. Sue Ellen Moves In/The Perfect Brother

Arthur season 1 episode 21 is titled "Sue Ellen Moves In/The Perfect Brother." In this episode, Sue Ellen moves into the neighborhood and joins Arthur and his friends at school. The group is excited to have a new friend and invite her to their treehouse. However, when Sue Ellen accidentally falls through the floor of the treehouse, the group starts to doubt her abilities and intelligence.

Meanwhile, D.W. is convinced that she has the perfect brother and constantly brags about him to her friends. However, when her brother, a famous explorer, comes to visit, D.W. learns that he is not as perfect as she thought.

As Sue Ellen tries to win back the group's trust, the friends learn a valuable lesson about accepting and embracing the differences in others. Meanwhile, D.W. learns that even the people we look up to can have flaws and imperfections.

The episode is filled with humor and heartwarming moments as the characters navigate their relationships with each other and learn important life lessons. Viewers of all ages will enjoy watching the adventures of Arthur and his friends as they learn and grow together.