William Christopher (b. 10/20/1932) played the priest on the CBS television series M*A*S*H (1972-83). He is very active in support for the National Autistic Society.
William Christopher portrayed Father Francis P. Mulcahy in the TV series MASH. (In the pilot episode, this character was played by George Morgan.)
In the 1970 film, Father John Mulcahy was played by Rene Auberjonois. In the 1972-1983 television series, Father Francis Mulcahy was played by William Christopher.
Donald Sutherland played Benjamin "Hawkeye" Pierce in the Movie "MASH" Alan Alda played Hawkeye in the TV series.
Harry Morgan played a lawyer named Colonel Sherman T. Potter in the TV series MASH.
B.J. Hunnicutt was played by Mike Farrell.
McLean Stevenson
Loretta Swit in the television series. Sally Kellerman in the movie.
If you are talking about the TV series then it would be Alan Alda.
Peter Jaques has: Played Schoolmaster in "If...." in 1968. Played Priest in "An Unsuitable Job for a Woman" in 1982. Played Priest in "The House" in 1984. Played Priest at cemetery. in "The Assam Garden" in 1985. Played Priest in "Parker" in 1985. Played Priest Carrying Bottle of Whisky in "Sid and Nancy" in 1986. Played Priest in "Drowning by Numbers" in 1988. Played Priest in "The Kitchen Child" in 1989. Played Priest in "Flight" in 1995. Played Priest in "Brothers in Trouble" in 1995. Played Priest in "Bring Me the Head of Mavis Davis" in 1997.
Alan Alda played Hawkeye Pierce in the tv series, in the film the role was played was Donald Sutherland.
Frank was played by actor Larry Linville.
On the TV show, it was Alan Alda. In the movie, it was Donald Sutherland.