The unrated director's cut runs 114 min. The heavily edited R-rated version runs 98 min.
The R version features several boxes that contain the words "CENSORED", covering various body parts (whether nude or dismembered). Additionally, for the heavier cut scenes, the movie freezes and a window appears on the screen with director Lloyd Kaufman explaining or comically re-enacting what was supposed to go on in the scene. The voices of characters uttering some swear words at some moments are replaced by an obviously mismatched voice that says the accepted version of the word. Finally, some body parts are replaced by images of animals (e.g. a pussy cat).
The 2-Disc Special Edition gives the viewer a choice to watch the Director's Unrated Cut or to watch the Director's Unrated Cut with even more deleted scenes put back into the film. This gives the running time of Terror Firmer over 125 minutes.