The main difference between the two versions of the controversial film "Caligula" is that the uncut version includes more sex and violence. There is a difference of 54 minutes between the edited and unedited versions.
The 1979 film told the story of Caligula, the third Roman emperor, whose reign was marked by violence and sexual excess. The movie's producer was Bob Guccione, the publisher of the pornographic magazine "Penthouse." It was banned in Great Britain for its scenes of incest and for including non-simulated sex.
Wanting to add more sex to the movie, Guccione filmed additional sex scenes with porn actors. Despite its connections to the porn industry, the film included legitimate big-screen stars, such as Malcolm McDowell, Helen Mirren and Peter O'Toole. The stars themselves, however, did not engage in the sexual acts that were filmed for the movie. Gore Vidal wrote the movie's script and later asked for his name to be removed from the credits. McDowell stood by his work in the movie but lamented Guccione's addition of pornographic scenes.
In a 2000 review of the film, Doug Schneider wrote that the uncut version had more hardcore sex and degrading acts, including any number of sexual fetishes, but that the movie was just as boring as the unedited version.