Older brother of actress Jennifer Holt.
Perhaps best remembered as the younger partner of Humphrey Bogart in The Treasure of the Sierra Madre (1948), in which his father, Jack Holt, played a bit part.
The only "B" Western hero to smoke in his films. He smoked a pipe.
The only time the three Holts appeared together was in 1946 in a CBS radio program entitled "All-Star Theatre", a country flavored show featuring Western music by Foy Willing and the Riders of the Purple Sage with a dramatic sketch. The Holts played father, son, and daughter.
Was the bombardier/executive officer for the top secret Adams Plan (Project X-ray), which was designed to drop incendiary bat bombs on Japan during World War II, as detailed in the book "Bat Bomb" by Jack Couffer.
Went to work at Oklahoma City radio station KLPR in 1961, doing sales and making personal appearances. It was Jack Beasly, owner of the radio station, and Ralph White, a co-worker, who encouraged him to take a role on "The Virginian" (1962).
While in the Army during WW II Tim Holt narrated a VD film seen by U.S. military personnel for many years afterward.