 "Peaceable Kingdom" stars Lindsay Wagner as the recently hired managing director of the Los Angeles County Zoo, who was also recently widowed with three children.Her zoologist colleagues included Tom Wopat and David Ackroyd.Perhaps due to scheduling competition from other networks (NBC's Top 20 hit "Unsolved Mysteries" and ABC's Top 30 hits "Growing Pains" and "Head of the Class"), "Peaceable Kingdom" was a ratings failure and CBS cancelled the series after seven episodes.