Mark Snow (born Martin Fulterman; August 26, 1946 – July 4, 2025) was an American composer for film and television. He was perhaps best known for composing the theme for The X-Files, and would compose for the show's initial nine-season run from 1993 to 2001. He would return for the show's revival from 2015 to 2018. Additionally, he composed the score for the two feature films and the short-lived spinoff series The Lone Gunmen.
In addition to The X-Files, Snow would serve as composer for shows including Smallville, Blue Bloods, Ghost Whisperer, Hart to Hart, Millennium, One Tree Hill, the 2002 revival of The Twilight Zone and Starsky & Hutch.
