Saw IV (2007)

Saw IV was the first film in the franchise to not be written by Leigh Whannell. It was released by Lionsgate in the United States on October 26, 2007, and received generally negative reviews from critics. Despite this, the film was a box office success, grossing $139 million worldwide. A sequel, titled Saw V, was released in 2008.

A microcassette is found in John Kramer’s stomach during his autopsy, which contains a posthumous message from John that informs Detective Mark Hoffman he will be tested. Elsewhere, two men – one with his eyes sewn shut, the other with his mouth sewn shut – awaken in a mausoleum, chained at the neck to a winch. The muted man can kill the blinded man to get a key from his collar and free himself.