Ep 3. The Mislaid Sketchbook Mystery / The Hot & Cold Mystery

The kids search for the owner of a sketchbook that contains drawings done from a high point of view. After determining the artist wasn't drawing at the top of a ladder or up in a tree, they discover the sketchbook belongs to one of Busytown's tallest residents, Jeremy Giraffe. A summer heat wave suddenly changes to winter-like weather, but only in Busytown. When Huckle, Sally and Lowly investigate why, they discover that hundreds of air conditioners installed by Mr. Fix-it have been accidently put in backwards, so they suck heat into buildings and blow cold air outside.