A 13-part series. Narrator David Attenborough 12: Danger!
Wilma George of Oxford University, Peter Grieg -Smith of the University of Sussex, Peter Marler of Rockefeller University, New York,
Eugene Morton of the National Zoological Park,
Washington, and Tom Strusacker of the New York Zoological Society, examine the vocal utterances of animals when danger threatens. Producer MICHAEL BRIGHT BBC Bristol