Saw
Two strangers wake up chained in a grimy bathroom, caught in a game set by a killer called Jigsaw. The micro-budget 2004 shocker with one of horror's most famous twist endings turned October into Saw season for the rest of the decade — and put Billy the puppet's spiral cheeks on Halloween costumes everywhere.
In 2001, two young Australians — director James Wan and writer Leigh Whannell — came up with a premise so simple it felt dangerous: two people chained in a room, no escape, a killer with a philosophy. In 2003 they shot a short-film version for about A$5,000 to attract producers, and it worked. The feature was shot in just 18 days on a budget of roughly $1–1.2 million, with Cary Elwes and Whannell himself as the captives, Danny Glover as the detective on the case, and Tobin Bell as Jigsaw.
Saw premiered at the Sundance Film Festival on January 19, 2004, and a film once planned for straight-to-video instead opened in theaters on October 29, 2004. It opened on Halloween weekend 2004 and went on to gross $104 million worldwide — one of the most profitable horror films since Scream. Billy the puppet, the pale-faced messenger that delivered Jigsaw's ultimatums, pedaled straight into Halloween-costume rotation, and the twist ending became one of the genre's most argued-about moments — the kind people debated at lunch the next day. Wan himself never set out to make what critics later called "torture porn"; that reputation came with the sequels' direction.
What followed became the 2000s' Halloween ritual. Saw II arrived in October 2005, and a new Saw hit theaters every October after, like clockwork, through Saw 3D in 2010 — the franchise colonized the season the way Christmas movies own December. For a certain generation, the question wasn't whether you'd see a horror movie over Halloween weekend; it was whether you could handle this year's Saw.
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