S21E20 To Surveil, with Love
When Homer leaves his gym bag unattended in a train station, they have to blow it up. This makes Chief Wiggum and his men set up surveillance cameras all over Springfield (apart from one place). Bart was riding his skateboard and ran into the Simpson's back yard, finding a blind spot, where everyone can do something illegal. Meanwhile, people are making fun of Lisa's hair because she's a blonde, so, to make people take her on more seriously, she dyes her hair Brown and becomes a brunette.