Crimson Tide is a 1995 American submarine action thriller film directed by Tony Scott and produced by Don Simpson and Jerry Bruckheimer. It takes place during a period of political turmoil in Russia, in which ultranationalists threaten to launch nuclear missiles at the United States and Japan.

The film focuses on a clash of wills between the seasoned commanding officer of a U.S. nuclear missile submarine (Gene Hackman) and his new executive officer (Denzel Washington), arising from conflicting interpretations of an order to launch their missiles. The story parallels a real incident during the Cuban Missile Crisis.

Hans Zimmer, who scored the film, won a Grammy Award for the main theme, which heavily uses synthesizers instead of traditional orchestral instruments. An extended cut, which incorporates seven minutes of deleted scenes, was released on DVD in 2006, while the 2008 Blu-ray release only includes the theatrical version.