I Spy with My Animal Eyes

S1 E18: Arnold messed up, big time. Ratney, Carlos’s pet rodent, escaped when Arnold was rat-sitting. Even worse, when they finally caught him, Arnold pressed the wrong buttons on the bus and made the critter not only giant-sized, but invisible! To find him, the kids must try out various ways animals see, from the high definition vision of hawks, to the UV vision of certain birds, to the vision of rats themselves. Along the way, they discover that the way other creatures view the world is truly eye-opening!