Past contestants from MasterChef Australia return for some new challenges. Adriano Zumbo presents an uber-tricky dessert. Can the all-stars recreate his masterpiece?

The teams face a four-round challenge, with nominated members cooking off against their opposite number.

The teams cook a sausage sizzle for 100 trainee firefighters.

More tense cooking challenges down under. This time, the contestants find eight ingredients in their mystery boxes, each of them chosen by a world famous chef.

In a fix-that-dish challenge, the all-stars need to rescue a poor bolognese in just 45 minutes.

This time, members of the losing team must revisit a tricky dessert challenge.