Blood-C: The Last Dark is a 2012 Japanese animated action horror film directed by Naoyoshi Shiotani and co-written by Nanase Ohkawa and Junichi Fujisaku; the film is based on the 2011 anime television series Blood-C co-created by studio Production I.G and manga artist group CLAMP, which the former also produced the film. Distributed by Shochiku, The Last Dark is set six months after the events of Blood-C; in the universe of Blood-C humanity is secretly preyed upon by a race called the Elder Bairns, whose feeding is kept under control by an ancient agreement called Shrovetide. The Last Dark follows Saya Kisaragi as she pursues Fumito Nanahara—the human guardian of Shrovetide who manipulated and betrayed her—through Tokyo with the help of an underground organization called SIRRUT. The film stars Nana Mizuki as the voice of Saya and Kenji Nojima as Fumito, alongside Ai Hashimoto, Hiroshi Kamiya, Yuki Kaji, Yuichi Nakamura, Kana Hanazawa, Yūko Kaida, Masumi Asano, Junichi Suwabe and Jun Fukuyama. The Last Dark was released in Japan on June 2, 2012.

The Last Dark was planned from the outset of the Blood-C project, and once plans were finalized it developed alongside the series. While it concluded the Blood-C storyline, the film adopted a very different tone, and included thematic and visual references to Blood: The Last Vampire. The movie also featured a character from CLAMP's manga series xxxHolic as a cameo. Its home media releases were respectively handled by Aniplex (Japan), Funimation (North America), Manga Entertainment (Europe) and Madman Entertainment (Australia). Reception to the film was mixed, receiving praise for its animation and music, while many faulted its story as being underdeveloped or straying too far from the series it concluded.