- There are two different versions of the "Mary Shaw" poem. In the movie the poem goes, "Beware the stare of Mary Shaw. She had no children only dolls. And if you see her in your dreams, do not ever, ever scream." On the trailer it was, "Beware the stare of Mary Shaw. She had no children, only dolls. And if you see her do not scream, she'll rip your tongue out at the seam."
- During the climax, in the storage area with all 101 dolls, you can see Jigsaw's doll from the Saw films sitting on the floor.
- "Billy" was not only the name of one of the dummies in this movie, but also the name of the puppet used by the Jigsaw killer in the "Saw" movies, also created by Leigh Whannell and James Wan.
- Donnie Wahlberg's character's name (Detective Lipton) has the same last name as his character in the HBO mini series Band of Brothers (2nd Lt. Lipton)
- The film is dedicated to producer Gregg Hoffman.
>>> WARNING: Here Be Spoilers <<<
Trivia items below here contain information that may give away important plot points. You may not want to read any further if you've not already seen this title.
Related Links