The teams are challenged to put a twist on some classic Italian dishes, with a top reward for the winning group and a morale-sapping punishment for the losers.
The teams are tasked with creating Mexican dishes, but only one can enjoy a treat, with the others having to clean out the animal pens. Later, a shock is in store at service.
Trouble brews in the Red Team, with Amber questioning their choice of Head Chef. The challenge sees the teams tackling a reception for newlyweds, before a difficult service.
The next day, after a conversation with Ariel (who initially wanted to transfer) about stepping up as a leader, Mia volunteers to move back to the red team.
The challenge is a three-on-three showdown to see which team can make the better lineup of desserts to impress Ramsay and restaurateur Valerie Gordon, each of whom will each give each dessert between one and five points.
Ramsay reveals that the eighteenth annual blind taste test will be their next challenge, and for that year, the chefs will taste gelatos infused with different flavors.
The chefs are introduced to the Chinese food challenge with a dragon dance performance outside. Ramsay asks selected contestants to pick an opponent to cook against, and the opponent will pick the protein to cook with.
After showing pictures of the chefs (along with the staff and Ramsay himself) in their teenage years, Ramsay announces for that night's service, he is hosting his youngest daughter Tilly's Sweet 16th birthday party.
To test the teams' communication and teamwork skills, Ramsay gives them 40 minutes to cook five entrees from the menu.
For their next challenge, both teams have to make a dish using potato as the main ingredient, and have to collect plastic body parts from Mr. Potato Head to collect their ingredients.
During the challenge, each team is tasked with cooking halibut seven different ways for Michelin star chef David LeFevre.
Families of the four remaining chefs visit. The chefs must base a dish on a secret ingredient hidden in a gift chosen by them.
The chefs must instruct some famous athletes to make their signature dishes using only verbal instructions. The contestants cook in one kitchen during dinner service.
The all-stars face three difficult challenges for the coveted black jacket.
The all-stars are given $20 to buy ingredients for restaurant-quality pasta dishes.
The remaining contestants must prepare a five-course meal for a private charity event.
The remaining contestants compete in a special challenge involving sea creatures.
The contestants must create a dish using exotic meats including boar, venison and elk that were eaten by early humans.
Both teams must replicate six Hell's Kitchen entrees while kicking chefs out of the kitchen until only one remains. That night, Chef Ramsay holds a special challenge.
The final two chefs prepare for their final service.