
Acting
Gary Richard Burghoff (born May 24, 1943) is an American actor, known for playing the character Corporal Walter Eugene "Radar" O'Reilly in the MASH series and Charlie Brown in the 1967 Off-Broadway musical You're a Good Man, Charlie Brown.
Description above from the Wikipedia article Gary Burghoff, licensed under CC-BY-SA, full list of contributors on Wikipedia.

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

Daniel's Lot
as Pastor Mahoney

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

Altman on His Own Terms
as Self
Enlisted: The Story of 'M*A*S*H'
as Self

Behind the Waterfall
as Mr. Connors

Small Kill
as Fleck / Lady Esmerelda

Memories of M*A*S*H
as Self / Radar O'Reilly

W*A*L*T*E*R
as Walter 'Radar' O'Reilly
Pets: Part of the Family
26 ep.

Hollywood Squares
as Self - Panelist · 1 ep.

Burke's Law
as Patrick Noyes · 1 ep.

AfterMASH
as Radar O'Reilly · 2 ep.

Tales of the Unexpected
as Harry Flock · 1 ep.
$weepstake$
as Roscoe Fuller · 1 ep.

Fantasy Island
as Richard C. Delaney · 1 ep.

The Love Boat
as Eddie Martin · 1 ep.

CHiPs
as Gary Burghoff (uncredited) · 1 ep.

Donny & Marie
as Self · 1 ep.