Invention Test: Heston Blumenthal Following a trip to Kangaroo Island the contestants get back into the kitchen and learn there is no Mystery Box. They end up finding themselves in an Invention Test with guest chef Heston Blumenthal. Links: Homepage – TV.com MasterChef.Australia.S04E49.PDTV.x264-TASTETV MP4 | AAC VBR | 368MB - Top Free Download Sources