William Christopher (October 20, 1932 – December 31, 2016) was an American actor, best known for playing Private Lester Hummel on 'Gomer Pyle, U.S.M.C.' from 1965 to 1968 and Father Mulcahy on the television series 'M*A*S*H' from 1972 to 1983 and its spinoff 'AfterMASH' from 1983 to 1985.

William Christopher made several appearances on Hogan's Heroes, and had recurring roles on 'Gomer Pyle, U.S.M.C.' and 'That Girl'. In 1972, Christopher gained the role of Father Mulcahy in the television series 'M*A*S*H' when the actor who was first cast in the role, George Morgan, was replaced after a single appearance in the pilot episode.

The character Father Mulcahy is a US Army chaplain assigned to the 4077th Mobile Army Surgical Hospital during the Korean War. While most of the staff are not religious, they still treat Fr. Mulcahy with some degree of respect.

After gaining attention for 'M*A*S*H', Christopher appeared in various other television series, including 'Good Times' (as the military doctor examining J. J. Evans) and 'Murder, She Wrote', and made multiple guest appearances on 'The Love Boat'. In 1998, he guest-starred as a priest in an episode of 'Mad About You'. He also remained active in the theatre, including a tour of the United States in the mid-1990s with Farr, performing Neil Simon's 'The Odd Couple' on stage.

One of Christopher's last roles was that of a priest (Father Tobias) on the NBC daytime drama 'Days of Our Lives'.

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