As ever, judges George Calombaris, Matt Preston and Gary Mehigan will be on hand to assist, taste and ultimately decide who stays and who goes.
In this series, they have their work cut out for them when controversy rears its head early in the competition - contestant Audra Morrice listed her occupation as Account Manager, but a newspaper expose revealed her company to be Audra's Gourmet Kitchen. Will she survive?
Series four starts when the top 50 gather in Melbourne at the Royal Exhibition Building and the South Melbourne Market for challenges that will make or break their progress into the final 24. With Mystery Box challenges, Pressure Tests, Masterclasses, Invention Tests and Elimination Challenges the motto 'cooking doesn't get tougher than this' is never truer.
Also look out for guest chefs later in the series like Rick Stein, Jamie Oliver, Heston Blumenthal, Marco Pierre White and Antonio Carluccio.