Peter Lupus (born June 17, 1932, Indianapolis, Indiana) is an American bodybuilder and actor of Syrian ancestry. He attended the Jordan College of Fine Arts at Butler University, where he also played football and basketball, graduating in 1954. He and his wife, Sharon, have a son, Peter Lupus III, who is also an actor.

Standing 6 feet 4 inches (193 cm) with a developed physique, Lupus earned the titles of Mr. Indianapolis, Mr. Indiana, Mr. Hercules and Mr. International Health Physique. Lupus was one of many bodybuilders who followed Steve Reeves into the sword and sandal films of the late 1950s and early 1960s, occasionally credited as Rock Stevens for such films as Hercules and the Tyrants of Babylon and Muscle Beach Party where he starred as "Mr. Galaxy" Flex Martian, the biggest, strongest, and handsomest bodybuilder in the galaxy who possessed muscles of steel.

Lupus is best remembered for the role of Willy Armitage on the original Mission: Impossible television series in the 1960s. Armitage was the Impossible Missions Force's muscle man, featured in nearly all episodes of the series. He initially played the strong, silent type, usually with very little dialogue. Late in the show's run during season five, the producers decided his character was superfluous and he was dropped to recurring status, appearing in a little over half of that season's episodes. Fan outcry and the lack of success in finding a replacement for his character resulted in his return to regular status the following season and getting a greater role in the stories, often assuming roles as a convict or thug. Only Lupus and Greg Morris sustained a regular role through the show's entire run, although Morris appeared in more episodes.

Helga Liné (born Helga Lina Stern on July 14, 1932) is a German-born Portuguese-Spanish film actress and circus acrobat best known for her work in the horror genre of film. She made 132 appearances mostly in film between 1941 and 2006, but most of her work has been in Spanish cinema.

Helga Line was born as Helga Lina Stern on July 14, 1932, in Berlin, Germany. At a young age her family fled Germany during the Nazi regime and took refuge in Portugal. At the age of just 9 years old she made her first film appearance there in the film Porto de Abrigo. Helga began her career as a dancer and acrobat in circus performances in Portugal throughout the 1940s and later became a model.

In the 1950s she made further appearances in film, but her career took off after she moved to Madrid in 1960. From this point, the red-headed actress made many appearances in the 1960s, particularly in horror films, action or spy thrillers, and westerns. She also starred in Hercules and the Tyrants of Babylon, which was filmed in 1964. Although she appeared in James Bond spoof films such as Agent 077 - Mission Bloody Mary (1965) alongside Ken Clark, she is well noted for her horror film work in particular, starring as the spy Natasha in the Gothic feature Horror Express, in the title role in The Lorelei's Grasp, as a predatory vampire countess in the erotic film The Vampires' Night Orgy, and as the leader of a Satanic cult in the Black Candles. She starred alongside Spanish horror actor Paul Naschy in two notable films: Horror Rises from the Tomb and The Mummy's Revenge.

Mario Petri (January 21, 1922, Perugia - January 26, 1985, Città della Pieve) was an Italian operatic bass particularly associated with Mozart and Rossini roles.

Petri began his career after World War II, making his stage debut in 1947 at the Teatro alla Scala in Milan, where he sang the following year the role of Creonte in the premiere of Stravinsky's Oedipus Rex, he also sang there his first Don Giovanni in 1950, a role he quickly became associated with throughout Italy.

He appeared in Rome, Florence, Venice, Parma, Bergamo, Verona, Naples. He sang opposite Maria Callas in the revival of Cherubini's Medea. In 1951, for the celebration of Verdi's 50th death anniversary, he sang on Italian radio (RAI) in I Lombardi, I masnadieri, and Simon Boccanegra.

Soon his reputation as Don Giovanni led to invitation to appear at the festivals of Glyndebourne, Salzburg, and Edinburgh. He sang relatively little outside Europe, though he made a few guest appearances in Dallas, in 1965.

His repertory included both Paisiello's and Rossini's Il barbiere di Siviglia, Le nozze di Figaro, L'italiana in Algeri, La cenerentola, Mosè in Egitto, Semiramide, opposite Joan Sutherland, etc.