Alternate versions

The film was colorized by Legend Films in 2005.

In the colorized Legend Films DVD release, during one shot of the scene where the Ghoul Man terrorizes the woman in her home, the images inside the picture frames on the bedroom wall have been digitally replaced with pictures of other people. This anomaly does not occur in any other print of Plan 9 and is unique to the Legend Films release.

[POSSIBLE SPOILER] Another anomaly unique to the colorized Legend Films version occurs when the body of Inspector Clay is discovered draped across a grave and the words "Paula & Russell" appear etched into the tombstone.

One more 'addition' to the Legend Films 'colorized' release is an added color visual effect where the alien Commanders face turns green in reaction to being hit soon after saying the line: "See? Your stupid minds, Stupid, Stupid!" He goes green as soon as he is hit then it fades to colorized normal skin tone after 30 seconds or so. There is no way he could have turned a different color like this in the B/W version as its luminance is as bright as the colorized skin. It would read as the same level gray.

When the film was released in Hungary in the 2000s, it was given a deliberately horrible dub, recorded not with professional voice talent but with random employees of the DVD distributing company, all of whom could barely act. This was made to make the movie even more laughable.

The original title, "Grave Robbers From Outer Space", was filmed and appeared on the preview print. The replacement title "Plan Nine From Outer Space" was filmed and matted over a special effects shot showing the alien space station. The original title was simply cut out and the new title footage spliced onto the negative. The footage of Criswell introducing the film as "Grave Robbers From Outer Space" was left unchanged.