Warrior of the Lost World (also known as Mad Rider) is a 1983 Italian-American post-apocalyptic science fiction film written and directed by David Worth and starring Robert Ginty, Persis Khambatta, and Donald Pleasence.

The Rider gains acceptance from various Marginals (amazons, martial artists, truckers, punks, soldiers, Omega defectors) by winning in the ritual brawl which determines who is the strongest.

Edward Sarlui pre-sold the movie using a poster of a masked biker in a futuristic landscape before a script had been written or a cast assembled intent on using the pre-sales to produce the film.

[1] After serving as a director of photography on two Clint Eastwood films, David Worth hoped to parlay this into a directing job and pitched his own project which he referred to as "High Plains Drifter on a motorcycle" to little success.

A recurring joke is that the crew can't remember the lead actor Robert Ginty's name, referring to him as "the Paper Chase guy."

According to Mary Jo Pehl, a writer and later cast member of the show, Ginty is "assisted and outacted by his supersonic speedcycle", and his kiss with Persis Khambatta in the climactic scene is "guaranteed to traumatize even the most-hardened maker-outer".