Rich Man, Poor Man (1976)

S13E17 Fighting Irish

Peter boasts that he could defeat Liam Neeson (voiced by Liam Neeson) in a fight, but when he faces the challenge, he discovers that victory isn’t as easy as he imagined. At the same time, Stewie feels envious when Lois chooses to take on the role of class mom, leading her to focus more on the other children instead of him.