A great part of the film was filmed in Russia, where nearly all the crew spoke only Russian. Elisha Cuthbert says that only a handful of the cast were there from America, 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 extremely evident in Elisha Cuthbert's hairstyle. It changes throughout the movie. In the first shoot her hair was more of a shag style, while in the re-shoot it is all one length. Her hair often changes in the middle of scenes (e.g. running from one room with a shag style but entering the next room with different hairstyle.)
The initial advertising campaign for Captivity featured a multi-paneled poster. The first panel was labeled "Abduction," featuring actress 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 placed on several billboards across Los Angeles, causing a significant uproar and resulting in many complaints. Distributor Lionsgate - who were not involved in the film's advertising campaign and claimed to know nothing of the poster in question before the posters were distributed - and producer After Dark Films ultimately decided to remove the controversial poster from the advertising campaign and took 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.
The version shown on The Movie Channel is none of the previous versions, runtime on IMDb is 96 minutes and what was shown was 84 minute runtime.