Kevin Hagen was born in Chicago April 3, 1928. The son of professional ballroom dancers, he attended Oregon State University and spent some time in the U.S. Navy. He went on to earn a degree in international relations at University of Southern California. At 27, he decided to try his hand at acting. In the early 1960s, Hagen garnered several film and TV projects. His big break came in 1974, when he was hired to be Doc Baker in Little House on the Prairie. For the duration of the entire series, Hagen brought the compassionate Walnut Grove doctor alive.
Though the series ended, Hagen kept Doc Baker alive in his one-man show "A Playful Dose of Prairie Wisdom." He created the play based on the doctor he played on Little House. On July 9, 2005, Hagen died while living in Oregon.
As the only doctor in Walnut Grove, Doc Baker has his hands full healing the sick, mending the wounded and birthing babies. His endless house calls leave him little time for his own life. Though highly respected and revered by the townspeople, Doc doesn't always get cash for his services. He is overwhelmed by the number of chickens, pies or other means of tender to settle his fees. But Doc is sensitive to the misfortunes of others. That's why his gentle and compassionate demeanor makes him the treasured resident of Walnut Grove.