This is one of the very few times Ned had a villainous role. He banned the theory of evolution and Lisa was arrested for teaching it. However, Ned apologizes to Lisa for his actions and even offered to take her and the other kids out for ice cream.
This is the second time in the series that only Lisa was arrested.
From this episode onwards, Ned develops a greater respect for religions outside of Christianity.
When Seymour Skinner holds up the textbook "Life In These 38 States", 39 states appear on the cover: the first 38, plus Oklahoma (the 46th state).
Seen from afar in the court room, Lenny has no stubble.