Mongrels first aired on BBC Three in 2010 and ran for two series before ending in 2011. Created as an adult puppet sitcom, it centred on metrosexual fox Nelson and his animal friends living in the grounds of a London pub, with musical numbers and celebrity voice guests as part of its style. Its opening credits theme became one of its most recognisable elements for viewers. Short clips of the theme still circulate among fans sharing episodes, edits and memories of the short lived series.