He appeared in numerous films such as The Day Mars Invaded Earth, The Ballad of Cable Hogue, and Hot Rods to Hell.

He also appeared in classic television series such as Hogan's Heroes, The Beverly Hillbillies, Petticoat Junction, Bonanza, Custer, Wagon Train, Lancer, Perry Mason, Alfred Hitchcock Presents, Thriller, The Twilight Zone, The Fugitive, The Wild Wild West, Airwolf, Adam-12, Ironside, Night Gallery, Kolchak: The Night Stalker, Kung Fu, Columbo and Fantasy Island .

[2] In 1962 Mims appeared as Frank Farnum on the TV western Lawman in the episode titled "The Bride."

[citation needed] Mims was born in Carthage, Missouri, in 1927 and moved to Los Angeles when still a teenager.

In addition to his film and TV roles, he acted on the Los Angeles stage in Inherit the Wind and Cat on a Hot Tin Roof.