Suspect X (容疑者Xの献身, Yōgisha Ekkusu no Kenshin) is a 2008 Japanese mystery-thriller film based on the novel, The Devotion of Suspect X, directed by Hiroshi Nishitani. The film was a continuation of the popular Japanese serial drama Galileo and included the same cast. It topped Japan's box office for four consecutive weeks and was the third-highest grossing Japanese movie in 2008. The soundtrack was released on October 1, 2008.