MasterChef plates up record-low audience for premiere Weâre sorry, this service is currently unavailable. Please try again later. Dismiss Save Normal text size MasterChef Australia served up a season launch that netted a record-low audience. An average 670,000 metropolitan viewers tuned in to watch season 13âs debut â down from the 1.23 million who watched last yearâs premiere. Mondayâs figures represent the smallest metropolitan audience for a main season premiere in 12 years, and the second-smallest if the showâs spin-offs are included. (Last yearâs debut of Junior MasterChef Australia netted 524,000 metro viewers.) MasterChef judges Melissa Leong, Jock Zonfrillo and Andy Allen.