Alternate versions

A 2-3 minute segment following the projection sequence was excised from the film in the mid-1950s following a lawsuit from a real-life scientist whose name was used in the story for a fictional explanation of atomic energy effects on ants. The scene was removed from the negative and has not been restored though it has turned up in some collector's prints.

Older television prints show the title card in the opening credits in black-and-white only; current prints have restored the title "Them" in colour, with a black-and-white background, as it was presented during the film's original theatrical showings.