The Monster of Mangatiti When 19 year old Heather Walsh accepts a job on a farm in the Mangatiti Valley, she has no idea paradise will become a nightmare. This true New Zealand story tells of Heather's horrific ordeal. Details Casts Galleries Posters Title The Monster of Mangatiti Release Date 2015-09-06 Runtime 01 Hours 10 Minutes Genres Drama TV Movie Production Companies Screentime Production Countries New Zealand Greta Gregory... Heather Walsh... Mark Mitchinson... Bill Cornelius... Flynn Allan... Benn Cornelius... Mark Warren... Det Demchy... Roz Turnbull... Heather (2008)... Alison Quigan... Shirley Petrie... Harriet Beattie... Joanne... John Sumner... Malcolm... Margaret Mary Hollins... Angela... Edwin Wright... Doug Cornelius... Carolyn Dando... Christine... Greg Smith... George Kingsland... Ruth Dudding... Doctor... Original Size (1280x720) Original Size (667x1000)