
Acting
William Christopher (October 20, 1932 – December 31, 2016) was an American actor and comedian, 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 MASH from 1972 to 1983 and its spinoff After MASH from 1983 to 1985.
Description above from the Wikipedia article William Christopher, licensed under CC-BY-SA, full list of contributors on Wikipedia.

M*A*S*H: The Comedy That Changed Television
as Self

M*A*S*H: 30th Anniversary Reunion
as Himself

Heaven Sent
as Priest

Memories of M*A*S*H
as Self / Father Mulcahy

The Little Troll Prince
as Bjørn
Making 'M*A*S*H'
as Self

For the Love of It
as Barton

Hearts of the West
as Bank Teller

The Shakiest Gun in the West
as Hotel Manager (uncredited)

With Six You Get Eggroll
as Zip (Cloud)

Team Knight Rider
as Professor Roykirk · 1 ep.

Diagnosis: Murder
as Art Amador / Martin Beckman · 1 ep.

Lois & Clark: The New Adventures of Superman
as Andrus · 1 ep.

Mad About You
as Chaplain Olson · 1 ep.

The New WKRP in Cincinnati
1 ep.

Snoops
as Harvey Allen · 1 ep.

Murder, She Wrote
as Burton Hollis · 1 ep.

AfterMASH
as Father Mulcahy · 31 ep.

The Love Boat
as Elliot Weatherly · 1 ep.

Dinah!
as Self · 1 ep.