Danger Mouse's next project was "The Mouse and the Mask", a collaboration with MF DOOM (as DANGERDOOM) about and for Cartoon Network's Adult Swim. The two had previously collaborated on the Danger Mouse remix of Zero 7's "Somersault", on the Prince Po track "Social Distortion", and on Gorillaz' "November Has Come". A year later, DANGERDOOM released a follow-up EP called "Occult Hymn". The 7-track EP featured new songs as well as remixes of tracks from "The Mouse & The Mask" and was released exclusively as a free download on Adult Swim's site.