According to his rep, Christopher died at 5:10 a.m. PT on Saturday morning with his wife nearby. Christopher's son, John Christopher, told ABC that the actor died from a non-lung small cell carcinoma at his home in Pasadena, California.
Christopher was diagnosed with cancer a year-and-a-half ago. He had begun a new treatment about a month ago but his health deteriorated “about a week ago.” He entered hospice care on Monday, December 26.
“[He was] not in pain he went peacefully,” his rep said.
Christopher rose to fame playing Father John Mulcahy on the classic CBS comedy, M*A*S*H. He continued the role on the much panned spin-off series, After MASH.
His long list of TV credits included appearances on Hogan's Heroes, Gomer Pyle: USMC and The Love Boat. He also did voice-over work for the 1980s hit Smurfs.
He most recently portrayed Father Tobais in an 11-episode guest stint on NBC soap opera Days of our Lives in 2012.
Christopher, who was a real-life Methodist priest according to TMZ, often played men of God in his frequent TV appearances.
The actor, who was born in Evanston, Illinois, is survived by his wife Barbara, and their two sons, John and Ned.