A large part of the film was filmed in Russia, where nearly the whole crew spoke only Russian. Elisha Cuthbert said that only a handful of the cast were from the US and formed a tight-knit group since they spoke no Russian.
The film was heavily re-shot to turn it from a thriller to a torture/horror film. This is evident in Elisha Cuthbert's hairstyle as it changed throughout the movie. In the first shoot, her hair was a shag style, while in the re-shoot, it is all one length. Her hair often changed in the middle of scenes (e.g. running from one room with a shag style but entering the next room with a different hairstyle).
The initial advertising campaign for the movie featured a multi-paneled poster. The first panel was labeled "Abduction" and featured Elisha Cuthbert appearing petrified, her mouth covered by a black-gloved hand. The second panel was labeled "Confinement" and showed Cuthbert behind a chain-link fence with a bloody thumb poking through. The third was labeled "Torture" and featured Cuthbert on her back, her face hidden within a white cast and red tubes going up her nose. The fourth panel was labeled "Termination" and featured what appeared to be a limp body hanging over a table. The poster was on several billboards across Los Angeles, causing a significant uproar and resulting in many complaints. Distributor Lionsgate - who was not involved in the advertising campaign claiming to know nothing of the poster in question before its distribution - and producer After Dark Films ultimately decided to remove the controversial poster from the advertising campaign, taking the billboards down.
The version that is available on Netflix is actually the original cut without any of the gore, which was previously only released in Spain.
Despite the fact that this was filmed in Super 35, "Filmed in Panavision" is listed in the end credits.