Jacob Joachim "Jack" Klugman (April 27, 1922 - December 24, 2012) was an American stage, film and television actor. He was best known as Felix Unger's sloppy roommate Oscar Madison in the American television series The Odd Couple (1970-1975), for his starring role in Quincy, M.E. (1976-1983), as Juror #5 in 12 Angry Men, and his multiple appearances on The Twilight Zone.
A heavy smoker, Klugman was diagnosed with throat cancer in 1974. In 1989, he lost a vocal cord to cancer, but continued to act on stage and television, though he was left with a raspy, scratchy voice.
Jack Klugman cause of death
Klugman died at the age of 90 at his home in Northridge, California, with his wife, Peggy, at his side. He is survived by his sons, David and Adam, and two grandchildren.