Hooper Atchley and who starred in Mystery Mountain

Al Bridge (26 February 1891-27 December 1957), the American character actor who played mostly small roles in over 270 films between 1931 and 1954

Syd Saylor (24 March 1895 - 21 December 1962), the light comedy actor and movie cowboy sidekick who appeared in 395 films and TV series between 1926 and 1962

Edward Earle (July 16, 1882 - December 15, 1972), the Canadian film actor

Lynton Brent (2 August 1897 - 2 July 1981), the American film actor

Kenneth Olin "Ken" Maynard (July 21, 1895 - March 23, 1973), the American motion picture stuntman and actor

Tom London (August 24, 1889 – December 5, 1963), the American actor who, according to "The Guinness Book of Movie Records," is credited with appearing in the most movies in the history of Hollywood

Verna Hillie (5 May 1914 - 3 October 1997), the American film actress

George Chesebro (29 July 1888 - 28 May 1959), the American film actor

Bob Kortman (24 December 1887 - 13 March 1967), the American film actor mostly associated with westerns, though he also appeared in a number of Laurel and Hardy comedies

Edward Hearn (6 September 1888 - 15 April 1963), the American actor