The film was cut a number of times, from 187 minutes to 185 to 165 to 158. The very first scene to go was one between Commodus and Livius in the middle of their drinking session on arriving at the German fort. As they go upstairs to pick out two of the hostage German women, Commodus explains that he is on the horns of not a dilemma by a trilemma - if there are gods, they have decided what he will do so it doesn't matter whether he is good or bad; if there are no gods, then it simply doesn't matter if he leads a good or a bad life; and if he himself is a god, then he gets to decide what is good or bad. That is why, if you listen carefully, you can hear the gods laughing... The omission of this scene explains that incredibly abrupt cut from them going upstairs to Commodus trying to force a drink on the German girl. There are a number of cuts in the other versions, most notably the second scene with Marcus Aurelius and Lucilla; most of Timonides' big speech to the Senate about accepting the barbarians into the Empire; and the scene where Livius tries to appeal to the Senate after failing to sway Commodus in the temple only for them to turn against him and arrest him. In some prints, the first scene after the intermission, of Lucilla leaving Marcus Aurelius' meditations in the temple for safekeeping is also dropped. Sadly, the only version that was ever released uncut was the Super 8mm feature release back in the early 1990s, which was taken from the original 16mm neg that was struck before any of the cuts were made but which was prohibitively expensive.
The non-roadshow version was cut to 153 minutes from the original 172 minutes running time.