Gary Burghoff
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.
Cast
M*A*S*H
Cpl. 'Radar' O'Reilly
W*A*L*T*E*R
Walter 'Radar' O'Reilly
Casino
Bill Taylor
Behind the Waterfall
Mr. Connors
Making 'M*A*S*H'
Self
Twigs
The Priest
M*A*S*H: The Comedy That Changed Television
Self
B.S. I Love You
Ted
The Man in the Santa Claus Suit
Bob Willis
The Real M*A*S*H
Himself
Small Kill
Fleck / Lady Esmerelda
M*A*S*H: 30th Anniversary Reunion
Himself
Memories of M*A*S*H
Self / Radar O'Reilly
Enlisted: The Story of 'M*A*S*H'
Self
Daniel's Lot
Pastor Mahoney
Altman on His Own Terms
Self