Daphne Oz guest judges; chefs from the Northeast prepare their signature dishes.

The auditions continue as chefs from the Midwest battle it out for a coveted spot in the top 20. Each contestant has 45 minutes to prepare a signature dish that impresses the judges in order to continue on in the competition.

Chefs of the West are the next up in the audition round. Each contestant has 45 minutes to prepare a signature dish that will impress the judges and secure a spot in the top 20.

The "United Tastes of America" auditions conclude with chefs from the South. Each contestant has 45 minutes to prepare a signature dish that will impress the judges and secure the five remaining spots in the Top 20.

The remaining home chefs face the hardest challenge yet in this scrumptious 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 recreate.

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

In this week's challenge, the Mystery Box is back, and the chefs must individually face the challenge of preparing a gourmet meal out of army rations.

The remaining home chefs must tackle a classic MasterChef test: the tag team challenge. The contestants must take turns preparing a delicious three-course meal, working together to ensure they are on the same page every step of the way.

The remaining nine home cooks are tasked with firing up their grills and preparing a restaurant quality barbecue plate that is guaranteed to impress the judges.

With Gordon Ramsay's reputation on the line, 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 will move on to the Finals.

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