Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

Henry goes belly-up -- Damage control -- The autopsy -- Home -- The girl in pink -- Diving in -- The jack -- Black mamba -- World of reptiles -- Summer's lead -- Larry the lizard -- Buck -- Carnivore canyon -- The end of the party -- The dead list -- Bad plans -- The funeral -- Safariland -- The chase -- Who did it -- Hippo River.