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Kevin Hagen (April 3, 1928 – July 9, 2005) was an American actor best known for his role as Dr. Hiram Baker on NBC's TV series Little House on the Prairie. Hagen was the son of professional ballroom dancers, Haakon Olaf Hagen and Marvel Lucile Wadsworth. His father abandoned the family when Kevin was five. He was raised by his mother, grandmother, and two aunts, with some help from his uncle, a physician. The family moved to Portland, Oregon, when Kevin was a teenager. He played baseball and football at Jefferson High School. He attended Oregon State University before enlisting in the U.S. Navy after World War II; he served in San Diego. Hagen, married four times, was a single parent for two decades to his son, Christopher Hagen, a Special Education teacher and high school baseball coach in Bakersfield, California.

The Ambulance
as Cop at Stables

Bonanza: The Next Generation
as Nathaniel Amsted

Matlock
as Dr. Halvern

Power
as Cop

Amazing Stories
as Rob Wellan

Little House: The Last Farewell
as Dr. Hiram Baker

Little House: Bless All the Dear Children
as Dr. Hiram Baker

Little House: Look Back to Yesterday
as Dr. Hiram Baker

Simon & Simon
as Tommy Luna

The Fall Guy
as Colonel Andrew Stonewall Hamilton

The Hunter
as Poker Player

Power
as Paul Hackett

Knots Landing
as Butler

The San Pedro Bums
as Mr. McClory

Quincy, M.E.

Joe Forrester

Bronk

Police Woman
as Norris

Little House on the Prairie
as Hiram Baker

Honky Tonk

The Soul of Nigger Charley
as Colonel Blanchard

Prologue to Wounded Knee
as Ken Shaeffer

M*A*S*H
as Colonel Coner

The Delphi Bureau: The Merchant of Death Assignment
as Luke

Dead Men Tell No Tales
as Karl

Monty Nash
as Sheriff Mannings

Vanished
as Matthew Silkworth

Weekend of Terror
as Lieutenant Papich

The Bold Ones: The Senator
as Jasper Lick

A Storm in Summer
as Policeman

The Bold Ones: The New Doctors
as Fairchild

The Learning Tree
as Doc Tim Cravens

Lancer

The Mod Squad
as Evans

The Outcasts

Land of the Giants
as Insp. Dobbs Kobick

Mannix
as Alan Guthrie

The High Chaparral
as Dolph Tanner

The Guns of Will Sonnett
as Kingman

Cimarron Strip
as Dum Dum

The Last Challenge
as Frank Garrison

Ironside

Mission: Impossible
as David Webster

Felony Squad

The Time Tunnel
as Sgt. Maddox

Blue Light

The Wild Wild West
as Silas Crotty

Lost in Space
as Alien

The Big Valley
as Harry Coleman

Shenandoah
as Mule - Rebel Deserter

Branded
as Paul Mandell
Profiles in Courage
as Sweet

Rio Conchos
as Blondebeard

Daniel Boone
as John Dobson

The Man from U.N.C.L.E.
as Krolik

Voyage to the Bottom of the Sea
as Komal

The Man from Galveston
as John Dillard

Kraft Suspense Theatre
as Nilsen

The Lieutenant

The Gallant Men