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Morton Downey Jr. | 'The Morton Downey Jr. Show,' 1987

Lung Cancer
On air for: Two seasons. Cause of cancellation: "The Morton Downey Jr. Show" expanded to national syndication in 1988, but distributors had trouble marketing the show to television stations because of its controversial nature. Downey suffered a viewership decline in his second year as host,... Gaylon Wampler / Associated Press