[1] He served as a fighter pilot in the United States Army Air Corps during World War II and was awarded the Purple Heart and the Distinguished Flying Cross.

[2] According to King's military enlistment records, he had graduated from high school and had worked as a general office clerk prior to joining the army in January 1942, just a month after Japan's attack on Pearl Harbor.

In 1954, King was cast as Lieutenant Charles B. Gatewood in the episode "Geronimo" of the syndicated series Stories of the Century, starring and narrated by Jim Davis.

He appeared twice on The Roy Rogers Show, The Life and Legend of Wyatt Earp, Tombstone Territory, and Johnny Ringo; and once on The Adventures of Kit Carson, Shotgun Slade, Black Saddle, Law of the Plainsman, Lawman, Laramie, The Virginian, and Yancy Derringer, in the latter as the bandit Jesse James in the episode "Outlaw at Liberty".

His last acting appearance was in the role of Major Jackson on ABC's The Green Hornet, in that series' two-part 1967 finale "Invasion from Outer Space."