performed for the first time in 1907, and then his most popular work. Ursus series (1960–1964) Following Buddy Baer's portrayal of Ursus in the classic 1951 film Quo Vadis, Ursus was used as a superhuman Roman-era character who became the protagonist in a series of Italian adventure films made in the early 1960s. When the Hercules film craze hit in 1959, Italian filmmakers were looking for other muscleman characters similar to Hercules whom they could exploit, resulting in the nine-film Ursus series listed below. Ursus was referred to as a "Son of Hercules" in two of the films when they were dubbed in English (in an attempt to cash in on the then-popular Hercules craze), although in the original Italian films, Ursus had no connection to Hercules whatsoever. In the English-dubbed version of one Ursus film (retitled Hercules, Prisoner of Evil), Ursus was referred to throughout the entire film as Hercules. There were a total of nine Italian films that featured Ursus as the main character, listed below as follows: Italian title/ English translation of the Italian title (American release title); Ursus / Ursus (Ursus, Son of Hercules, 1960) a.k.a. Mighty Ursus, a.k.a. Le fureur d'Hercule, starring Ed Fury La Vendetta di Ursus / The Revenge of Ursus (The Vengeance of Ursus, 1961), starring Samson Burke Ursus e la Ragazza Tartara / Ursus and the Tartar Girl (Ursus and the Tartar Princess, 1961) a.k.a. The Tartar Invasion, a.k.a. The Tartar Girl; starring Joe Robinson, Akim Tamiroff, Yoko Tani, directed by Remigio Del Grosso Ursus Nella Valle dei Leoni / Ursus in the Valley of the Lions (Valley of the Lions, 1962) starring Ed Fury, this film revealed the origin story of Ursus Ursus il gladiatore ribelle / Ursus the Rebel Gladiator (The Rebel Gladiators, 1962), starring Dan Vadis Ursus Nella Terra di Fuoco / Ursus in the Land of Fire (Son of Hercules in the Land of Fire, 1963) a.k.a. Son of Atlas in the Land of Fire, starring Ed Fury Ursus il terrore dei Kirghisi / Ursus, the Terror of the Kirghiz (Hercules, Prisoner of Evil, 1964) starring Reg Park Ercole, Sansone, Maciste e Ursus: gli invincibili / Hercules, Samson, Maciste and Ursus: The Invincibles (Samson and His Mighty Challenge, 1964), starring Yan Larvor as Ursus (a.k.a. "Combate dei Gigantes" or "Le Grand Defi") Gli Invincibili Tre / The Invincible Three (3 Avengers, 1964), starring Alan Steel as Ursus