Heathcliff and the Catillac Cats (1984)

Season 1: Episode 41

Iggy and Marcy take Heathcliff along shopping for an anniversary gift for Grandma and Grandpa Nutmeg. Heathcliff seizes every opportunity to cause mayhem in the department store, and even tries to swipe a rhinestone collar for Sonja to replace the one she's recently lost. On the way home, Heathcliff finds Sonja's lost collar in the grass, which makes him a hero.