UFO Ultramaiden Valkyrie is a Japanese manga series created by Kaishaku. The series was adapted into a 32-episode anime series and one specially released OVA episode by TNK. Seasons 1 and 2 were broadcast in Japan on Kids Station between 2002 and 2004. The anime series was released on DVD in Japan between 2002 and 2006. All episodes and the OVA special were dubbed in English and initially released on single DVD volumes in North America by ADV Films from 2006 to 2007.