The number "9" most notably refers to a 2009 animated post-apocalyptic science fiction film titled "9," directed by Shane Acker. The story is set in an alternate version of the 1940s after humanity has been wiped out by machines. The main character is a rag doll labeled "9" who awakens shortly after the mass extinction and embarks on a journey to survive and understand the remnants of the world. The film explores themes of survival, identity, and the struggle against a machine uprising, featuring a group of rag dolls who possess parts of a scientist's soul and fighting against a dangerous machine called the Brain. The movie received mixed reviews and earned about $48.4 million on a $30 million budget. It has notable voice actors including Elijah Wood and Jennifer Connelly.

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