Stephen C. Apostolof (February 25, 1928 – August 14, 2005), sometimes credited under aliases A.C. Stephen(s) or Robert Lee, was a Bulgarian-American filmmaker specializing in low-budget exploitation and erotic films, who gained a cult following for a wide variety of films that range from erotic horror (Orgy of the Dead) and suburban exposé to western-themed costume pictures and Mission Impossible-type capers such as. Apostolof had gained a reputation for creating high-quality mass entertainment with minimal budgets. He was also one of the few directors to work steadily with the infamous Ed Wood and such sexploitation icons as and Rene Bond in the 1960s and 1970s.