It's time for the final challenge. The dining room will be split between Petrozza and Christina. Each chef will create their own dream restaurant, and the two restaurants will compete head-to-head. They need to start thinking about their menu. This is their chance to show Chef Ramsay how good they really are.

Back upstairs, Christina and Petrozza get to work concocting menus. Christina stays up late to plow through, but Petrozza is distracted and hasn't made much headway on his.

The next morning Christina tells Petrozza she thinks she's finished, but Petrozza is still struggling.

The two head to the dining room and look over the open space that will become their restaurants. To help them out, Hell's Kitchen designer John Janavs will guide them. John tells Petrozza he believes the design should reflect the menu. Petrozza, however, doesn't yet have a menu to design around. Christina knows exactly what she wants. Petrozza seems to be hung up on flowers.

Jean-Phillipe then takes a turn helping Christina and Petrozza selecting the uniforms for their wait staff. What's strange is that everything Christina hates, Petrozza seems to love.

In the kitchen, Petrozza works with Sous Chef Scott and Christina works with Sous Chef Gloria to lock down their menus.

The two are summoned to Ramsay's office. Chef says that he is concerned. He wonders if he has chosen the right finalists. Yet it's a joke, and Ramsay bursts out, "I'm sure I do!" Chef Ramsay tells them, for inspiration, they need to pack their bags. They are off to New York City to eat at one of Chef's own restaurants.

While the chefs head to New York on a private jet, construction starts on their restaurants inside Hell's Kitchen.

On the jet, Ramsay jokes about Petrozza's signature dish, "Hen in a Pumpkin." Chef also calls him the messiest chef to ever cook in Hell's Kitchen. Christina smiles when Ramsay says that her nine challenge victories is the best among all Hell's Kitchen contestants.

From Times Square, the limo takes them to the kitchen of the Gordon Ramsay at The London Hotel. They stand back and watch how things are run inside the kitchen. Ramsay hands the two chefs new chef jackets and offers up the final challenge. Cook their signature dish right now inside the London kitchen.

Petrozza prepares filet mignon with caramelized onion risotto in a red wine aged balsamic demi-glace. Christina is grilling dry-aged New York strip steak with herbed compound butter and sweet corn succotash and roasted fingerling potatoes. She is very confident in her dish.

The judges for the challenge will be five executive chefs from Ramsay's restaurants around the world. The first chef up is Mark Sargeant, chef at Gordon Ramsay at Claridge's in London. He samples both dishes, and chooses Petrozza's.

Next is Angela Hartnett, the executive chef of Cielo in Boca Raton, Florida. She gives her honest opinion and selects Petrozza's again. The third chef is Stuart Gillies from The Boxwood Café at The Berkeley in London. Gillies gives good attention to both dishes, and rewards the point to Christina.

Simone Zanoni, the executive chef at Gordon Ramsay at The Trianon Palace in Versailles, France is up and awards the point to Christina. The challenge is now tied. The final chef is Josh Emett, chef at The Gordon Ramsay at The London Hotel in New York City. Emett tastes each dish and thinks it over. The winner of the challenge is finally Petrozza.

Petrozza can't believe it. His reward is that he will get to choose the first chef from this year's Hell's Kitchen contestants when he builds his team for the finale. This means Christina has to pick the last chef.

However, Christina isn't worried. She says that, no matter who Petrozza picks, they're still cooking Petrozza's food. She knows her food is much better.

Petrozza and Christina return to the Hell's Kitchen dining room to see how far the construction has come. Petrozza is thrilled, but Christina is not. Christina offers some fixes and heads off to try and sleep.

The final day in Hell's Kitchen arrives. Chef Ramsay calls up and orders the two finalists downstairs to pick their kitchen staff. He brings back Bobby, Ben, Corey, Matt, Louross and finally Jen. Jen's goal is to make Ramsay second guess that he kicked her out of Hell's Kitchen.

Petrozza's first pick is Bobby and Christina chooses Corey. Petrozza rounds out his team with Ben. Christina grabs Louross. This leaves two people: Matt and Jen.