Biography
Karl Swenson (July 23, 1908 – October 8, 1978) was an American theatre, radio, film, and television actor. Swenson is remembered for his role as the doomsayer in the diner in Alfred Hitchcock's The Birds (1963) and as the voice of Merlin in Disney's The Sword in the Stone (1963). On television, he had numerous credits in guest roles on various shows, especially Westerns, including episodes of Bonanza, The Virginian, and Gunsmoke. He had a major recurring role as Walnut Grove founder Lars Hanson on Little House on the Prairie (1974 - 1978).
Swenson also had roles in The Prize (1963), Major Dundee (1965), The Sons of Katie Elder (1965), The Cincinnati Kid (1965), Seconds (1966), Hour of the Gun (1967), ...tick...tick...tick... (1970), The Wild Country (1970), Vanishing Point (1971) and Ulzana's Raid (1972).
Born in Brooklyn, New York of Swedish parentage, he originally planned to be a doctor and studied at Marietta College before pursuing acting. Swenson appeared extensively on the radio from the 1930s through the 1950s. He entered the film industry in 1943 with two wartime documentary shorts, December 7 and The Sikorsky Helicopter. Swenson was married to actress Joan Tompkins. He died of a heart attack at Charlotte Hungerford Hospital in Torrington, Connecticut on October 8, 1978, shortly after filming the Little House on the Prairie episode in which his character dies. The episode aired on October 16, 1978, eight days after Swenson's death. He was interred at Center Cemetery in New Milford, Connecticut.
Filmography
Cast Credits

Disney Sing-Along Songs: Colors of the Wind
Character: (voice) (archive footage)
MOVIE • 1995
Disney's Sing-Along Songs: Under the Sea
Character: Merlin (archive footage) (voice)
MOVIE • 1990

Disney's Halloween Treat
Character: Merlin (voice) (archive footage)
MOVIE • 1982

The Amazing Spider-Man
Character:
TV • 1978

Disney's Greatest Villains
Character: Merlin (voice) (archive footage)
MOVIE • 1977

Little House on the Prairie
Character: Lars Hanson
TV • 1974

The Gun and the Pulpit
Character: Adams
MOVIE • 1974

Happy Days
Character:
TV • 1974

Doc Elliot
Character:
TV • 1973

Ulzana's Raid
Character: Rukeyser
MOVIE • 1972

Ghost Story
Character: Ed Barnes
TV • 1972

The New Healers
Character: Mr. Fisherman
MOVIE • 1972

Emergency!
Character: Gus
TV • 1972

A Howling in the Woods
Character: Apperson
MOVIE • 1971

Cannon
Character:
TV • 1971

Vanishing Point
Character: Clerk
MOVIE • 1971

The Wild Country
Character: Jensen
MOVIE • 1970

The Odd Couple
Character: Captain Potter
TV • 1970

The Immortal
Character:
TV • 1970

The Young Rebels
Character:
TV • 1970