The contestants must get at least three yes votes this season to earn an apron, and in today's episode it is contestants from the Northeast region. Daphne Oz is the guest judge. The first contestant competing for an apron is Carla and she does not advance

The Midwest region contestants begin their auditions, with Graham Elliot joining as the guest judge. Grant is the first contestant up and gets three yes votes and the first apron. Sarah is next and also gets three yes votes and an apron

The West region contestants begin their auditions. This week the guest judge is Susan Feniger. Lizzie is the first contestant to audition and she earns four yes votes earning her the night's first apron

The South region is the final region for auditions, and this week Tiffany Derry joins the judges for the voting. Reagan starts off the auditions and gets four yes votes and the first apron of the night. Austyn is up next but gets two immediate no votes, so she fails

The home chefs enter the kitchen for their first challenge: creating a state fair-inspired dish; whoever wins the challenge grants the rest of their region immunity from going home

The remaining home chefs face their first mystery box challenge -- apples; with both sweet and savoury flavours on the table, the chef with immunity is tasked with assigning each region which kind of dish to cook

The home chefs face their first team challenge when they're tasked with pairing up with another region and grilling a delicious meal for 101 firefighters and emergency personnel

The top 17 home chef's return to the kitchen for their second mystery box challenge, but this time with a twist -- one region begins the challenge 10 minutes behind the rest

The remaining home chefs face the hardest challenge yet in this celebration of "MasterChef's" 250th episode; the kitchen heats up when the chef with immunity is tasked to assign each contestant with an iconic cake to re-create

The chefs split into two teams to prepare a lunch for over 100 kids at Dodger Stadium; the chef with immunity gets to choose one member from each team who must swap sides and work with the other regions

The chefs must prepare a gourmet meal out of Army rations. Chef Andre Rush guest judges

The remaining home chefs must tackle a classic MasterChef test -- the tag team challenge; the contestants take turn preparing a delicious three-course meal

The chefs face their toughest mystery box challenge yet -- fish

The Contestants must cater to the average sports fan while incorporating elements from their region to elevate their dish

The remaining nine home cooks must prepare a restaurant quality barbecue plate

The chef with immunity must pair contestants to cook on opposite side of the wall, where they must rely on great communication to save themselves from elimination

The top six chefs face the ultimate challenge of taking over the world's largest Hell's Kitchen restaurant

The remaining five home cooks take on two rounds of challenges that determine who moves on to the finals

The final three home cooks take on their last challenge in the MasterChef kitchen in front of a live audience. Each chef has to whip up a spectacular three-course meal, knowing only one deliberation stands between them and the $250,000 prize

Judges Gordon Ramsay, Aarón Sánchez and Joe Bastianich crown the next MasterChef champion