Marshall Kent

Marshall Kent was an American television and film actor who appeared in 30 television series or films between 1956 and 1977. He was best known for his role as "Doc" in the 1958 spoof of Gunsmoke presented as an episode of Maverick starring James Garner entitled "Gun-Shy."

WIKIPEDIA

LITTLE HOUSE ON THE PRAIRIE · S3, E13

Quarantine

Doc Baker assists with an outbreak of mountain fever in a nearby town. The people of Walnut Grove are hopeful that the disease will overpass their community. Grace and Isaiah's young daughter Alicia becomes seriously ill, so Isaiah takes her to an abandoned house in town to nurse her back to health. Laura appears to have the fever as well, and Charles frantically sets out to find Doc Baker.
THE DORIS DAY SHOW · S2, E5

The Chocolate Bar War

Doris and her boss attend a dinner party given by an important businessman. The man's wife just happened to battle Doris over the sale of scout candy.
LOCK UP · S2, E21

A French Affair

Herb Maris travels to Paris to close a merger deal with a corporate client and Lt. Weston goes along to learn from Interpol. When his client can't be found, Herb suspects foul play and notifies the French police.