1. While in preparation for the film, director Eric Valette never watched the original Japanese version Chakushin Ari (2003), and asked the actors not to watch it either.
2. Not screened for critics.
3. Guillermo del Toro was offered the chance to direct, but turned it down to work on Hellboy II: The Golden Army.
4. Jason Horgan was originally considered for the part of Ray Purvis, but the producers felt he was too young. The part went to Jason Beghe, and Horgan was cast as Dr. Ken Brown.

"On the shortlist for least essential movie of the decade, a copy of a copy of a copy that's so worn down, it's about as fresh and vital as a fifth-generation dub of 'The Star Wars Holiday Special.'" - The Onion

"The result is yet another tired, ultimately incoherent horror movie that undoes the promise of its pretty good premise and potentially interesting story structure with dull scares, sloppy ending and a pair of unconvincing, leaden lead performances." - TV Guide