* DeletedScenes: Over half-an-hour of footage was removed from the original cut, notably the "snails and oysters" exchange between Crassus and Antoninus, and some of the more graphic battle scenes. Some of this was restored in the early '90s. It's also alleged that the Battle of Metapontnum was filmed but cut from the final version, and that Julius Caesar's subplot (defecting from Gracchus to Crassus) was far more prominent in Kubrick's original cut.
* HeyItsThatGuy: Draba, the BlackBestFriend, is played by Woody Strode. He was better known as Draba than for anything else he did, but before he became an actor he broke the color line in the NFL in 1946.
* RealitySubtext: The credited screenwriter, Dalton Trumbo, was blacklisted from Hollywood for refusing to name names during the Red Scare. There's even a line where Crassus proclaims "Lists of the disloyal are being compiled," [[DoesThisRemindYouOfAnything making this explicit]].
** Not just the screenwriter. The writer of the original novel was also on the blacklist.
* TroubledProduction: Fighting between Kirk Douglas and Stanley Kubrick, tensions among the cast, a script being repeatedly revised, the production running extremely over-budget (especially for the final battle, a [[ThrowItIn last-second decision]] that cost over a million dollars), run-ins with [[ExecutiveMeddling studio censors]] and MoralGuardians alike... this one touches pretty much everything.