S2, E5: It's the Zoo Director's birthday and Mr. Pickler, the Mayor's secretary presents him with Chico the tassel-eared monkey from his boss. Because Chico doesn't get on with the other monkeys, he is put into the cockatoos' cage. But then Chico has suddenly disappeared. Benjamin and Otto set off to look for him. They find him with Anna and John, two children who have made friends with him in the zoo. Is Chico really a little runaway or have the children secretly taken him out of the zoo?