Emil Sitka (December 22, 1914 – January 16, 1998) was a veteran American actor who appeared in hundreds of movies, short films, and television shows, and is best known for his numerous appearances with The Three Stooges. He is one of only two actors to have worked with all six Stooges (Shemp Howard, Moe Howard, Larry Fine, Curly Howard, Joe Besser, Joe DeRita) on film in the various incarnations of the group (Harold Brauer, a recurring villain who appeared in three 1940s shorts, was the other). Sitka served the role of a literal "stooge," or straight man, to the Three Stooges throughout nearly 40 of their short films, most of which were filmed during Shemp's run as the third stooge. In addition to one single appearance during Curly's run with the trio, and a limited number of appearances during Besser's, Sitka returned as a near-regular character when the trio returned to film and television with DeRita. His frequent appearances with the trio, and his role as stooge to the stooges, have earned him the informal title of being the "fourth stooge".