Alternate versions

The German version omits all footage about the holocaust and the third Reich.

In 2003, the BBFC passed a less cut version, removing 2m 19s of animal cruelty ("to sight of fighting dogs and monkey being cruelly beaten to death"). They later issued a more detailed description of the cuts, stating that the dogfight had been completely removed but the monkey scene had been edited rather than completely cut. The brain-eating scene had been left in the movie, owing to the head being an obviously fake rubber one, and the main edits were to the shots of the clamped monkey as "It seems entirely possible that the head bashing was done with rubber hammers and the monkey came to no harm. However, the monkey was clearly - at least in the short term - restricted in a cage/head clamp and terrified and this is prohibited by law".

Home video versions added a recreation of a gas chamber execution which wasn't in the original theatrical print. Since film elements of this scene were unavailable for remastering in HD, the Blu-ray Disc includes this sequence as a stand-alone "deleted scene", taken from a VHS source.

In 2008, a US DVD released by Gorgon Video is fully uncut and known as the '30th Anniversary Edition'. This edition is taken from an HD source and appears to be far more complete than early DVD versions, which, due to print damage, often omit scenes.