Jack waits to find out what he's going to be cooking for the first round.
Turning in amusement, Jack wonders what is going on in the Junior MasterChef cook-off.
Gary looks on in interest as Jack explains what he's cooking.
Jack is amazed he made it into the Junior MasterChef Top 12.
Jack takes his time choosing the right ingredients for his amazing meal.
Gary looks a bit excited at what Jack says he's going to cook.
Jack takes the Tuck-Shop Group Challenge in his calm stride.
Getting ready for the 100 hungry high schoolers, Jack makes sure everything is neat and set to go.
Whatever the challenge is, it's had the same effect on Alex and Isabella.
Jack looks over his shoulder in wonder as he sees Isabella running behind him.
Both Jack and Isabella take their Poached Pears to the judges for tasting.
Cooking duck is no sweat for Jack who looks totally under control.
Jack looks quite chuffed to be in the Junior MasterChef kitchen.
Sure, it's a boxing ring but Jack has no qualms about cooking in a weird setting.
Getting a boost, Jack calls on Matt "The Mauler" Moran to give him a hand in the boxing ring.
Jack and the rest of the Junior MasterChefs are all smiles before the Sydney Swans Challenge.
Siena looks on as Jack takes the spinach into his hands.
Jack looks at the plate Cassidy gets and she looks over at his in interest.
Over at the Fish Markets, Jack learns about what to look for in good seafood.
The fish has been chosen and Jack has it in his hands to take back to Flying Fish.
Jack looks very much at home in the Flying Fish Restaurant kitchen.
Jack discovers he's got a place in the Top 4.
Looking up to the sky, it seems like Jack's saying a huge thankyou to everyone.
Jack looks over at the judges as if to ask if they're sure he's in.
Jack's almost in disbelief as the news continues to sink in.
Arms raised in victory, Jack finally lets the moment take hold. Good on you Jack!
Siena and Sofia run up to give Jack a huge bear hug.
Turning the tables, Jack has a taste of Stephanie Alexander's dish.
Stephanie Alexander and Jack give everyone a big clap for a Cook-A-Long well done.
Turning to Siena, Sofia and Isabella - it looks like Jack's wondering if he heard correctly.
Jack looks like he's really wishing he'd turned down the offer of trying a snail.
Isabella and Jack enter the Junior MasterChef kitchen to see what challenges they have to face.
The Top 10 look over Jack, giving him lots of moral support.
One challenge down and Jack gives Isabella a reassuring hug.
Jack brings his dish in for the judges to try.
Jack gives Isabella another hug to support her through the shock of amazing scores.
Jack looks down at the Adriano Zumbo creation and wonders if the judges are really serious.
Jack and Adriano have a pow wow over the mix master.
Time is ticking and Jack rushes to finish plating his Pear Perfections (which are looking really good).
Both Jack and Isabella are in shock after hearing Jack's first 11 out of 10 score.
Having cooked together for so long, it appears Jack and Isabella are also twins.
It's almost too much to take in for Jack after he gets his third 11 out of 10.
Isabella and Sofia's mum comes over to give Jack a big hug.
Isabella turns to Jack and gives him a standing ovation for his efforts.
Matt Preston hands Jack his Junior MasterChef trophy.
Good friends until the end, Jack and Isabella know they're both winners.
Jack gets lots of hugs from his family.
Everybody celebrates the phenomenal job that Jack and Isabella have done. Good on you guys!