Iggy brings a white mouse home from biology class who is quickly in a scuffle with Heathcliff. Grandpa calls in a Rodent-Removing-Robot who eventually wins a spectacular match of wit and trickery during which the entire Nutmeg house is town down to the ground. Heathcliff then saves the day by reprogramming the robot to rebuild the house at record speed. / When Hector finds a map to the Lost City of Catlantis, the Catillac Cats transform their car into a submarine to search for the missing city and its treasures. The undersea voyage holds many surprises for our friends: beautiful mermaids, a gigantic eel, and a hungry whale to name a few! when at last the cats reach their destination, they meet a friendly walrus who generously presents them with beautiful jewels to take home to an appreciative Cleo.