LAWRENCE SMITH/Stuff The set contained a number of vehicles and tents, production equipment and a large group of cast and crew on Friday morning. Muru, an action thriller, is based on the 2007 Tuhoe police raids. A Discovery New Zealand spokesperson said it will explore themes of race, identity and self-worth via a plot line which follows the plight of a local cop, trapped between opposing sides. The 90-minute piece, made by Jawbone Pictures, will debut on Three. The on-air date is yet to be released. Earlier in the month, residents received a note from the production company explaining there would be restricted access to the nearby roads due to the filming of the film.