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Series
MasterChef Australia
Season 18
Episode 12

MasterChef Australia S18 E12

Mystery Box Challenge: Catherine Zhang

Still from Mystery Box Challenge: Catherine Zhang

The Top 20 compete for Immunity from tomorrow's Elimination in a fruity Mystery Box challenge set by Catherine Zhang, marking the start of Viral Wonders Week

Previous episode

Elimination Challenge: Family Traditions

S18 E11

Next episode

Elimination Challenge: Viral Ingredients

S18 E13

Part of

MasterChef Australia

First aired: May 10, 2026
Runtime: 59 min
Network: 10

Season 18

E1Auditions: Group 1
E2Auditions: Group 2
E3Auditions: Second Chance
E4Mystery Box: Jimmy Barnes
E5Elimination Challenge: Family Favourites
E6Invention Test: Cereal
E7Pressure Test: Maggie Beer
E8Immunity Challenge: Andy Cooks
E9Elimination Challenge: Reinventing Carbs
E10Team Challenge: Family Feast
E11Elimination Challenge: Family Traditions
E12Mystery Box Challenge: Catherine Zhang
E13Elimination Challenge: Viral Ingredients
E14Team Service Challenge: Viral-worthy Dish
E15Immunity Pin Challenge: Khanh Ong
E16Mystery Box Challenge: Rick Stein
E17Elimination Challenge: Cuisines from Around the World
E18Invention Test: Fusion
E19Pressure Test: Rosheen Kaul
E20Mystery Box Challenge: Dim Sim Lim
E21Elimination Challenge: Heritage
E22Team Challenge: Team Relay
E23Immunity Pin Challenge: French Techniques
E24Mystery Box Challenge: Matt Sinclair & Daniel Dobra
E25Classic Pairs Elimination Challenge
E26Invention Test: Reese's Peanut Butter Cup
E27Elimination Challenge: Time or Ingredients?
E28Mystery Box Challenge: Curtis Stone
E29Elimination Challenge: Pork
E30Comeback Challenge
E31Elimination Challenge: Aussie Native Ingredients
E32Mystery Box Challenge: Adriano Zumbo
E33Elimination Challenge: Ice Cream Taste Test
E34Invention Test: Air Fryer
E35Immunity Pin Challenge: Beat the Chef
E36Skills Challenge: Fish Butchery
E37Elimination Challenge: Flat Iron Steak
E38Immunity Challenge: Tom Sarafian
E39Pressure Test: Kirsten Tibballs
E40Twins Challenge
E41Mystery Box Challenge: The Judge's Fridge
E42Team Challenge: Fine Dining
E43Elimination Challenge: Ingredient Choice
E44Mystery Box Challenge: Sanjeev Kapoor
E45Elimination Challenge: International Ingredients
E46Immunity Challenge: Ice Cream Flavours
E47Pressure Test: Sam Aisbett
E48Mystery Box Challenge: Marion Grasby
E49Elimination Challenge: Hot New Chilli Dish
E50Immunity Challenge: Hibachi
E51Elimination Challenge: Head-to-Head Duels
E52Mystery Box Challenge: One Ingredient
E53Elimination Challenge: French Sauces
E54Immunity Challenge: Keeping Up With Andy
E55Pressure Test: Malaysian Snacks
E56Immunity Challenge: Meghan Markle
E57Elimination Challenge: Letters From Home
E58Judges vs. Contestants
E59Semi Final: Two-course Service Challenge
E60Grand Finale