At the Bronx Zoo, Lisa goes on the rounds with a young veterinarian feeding baby animals. Marc visits Miami Seaquarium to see whales trained.Film insert: Leaf-cutter ants; flea circus.ANIMATION: Do you know how difficult an ant would be if it were the size of an elephant?THE BLOODHOUND GANG: ""The Case of the Professor's Fleas,"" a one-shot mystery surrounding a flea circus that has had all its stars stolen.