Smell is an episode of BrainPOP. It aired on September 14, 1999. It was written by Zeus Dunning with animation by Data Motion Arts.
Tim makes Moby test his smell. Tim then says he doesn't have a sense of smell, and he gets a letter. It is about smell. At the end, Moby gets frustrated when he hears about the joys of smelling food.
This was aired during a promotion on Nickelodeon called "Smell-O-Vision", combining new episodes of :The Wild Thornberrys" with scents (including cheese, soup, and perfume), and 3-D scenes.
The episode was remade in 2010.