It's the ultimate culinary war when the remaining 20 home cooks compete in the biggest field challenge in MASTERCHEF history: feeding an army of 500 servicemen and women on a desert army base. In their first team challenge, the contestants will split into two teams - the red team and the blue team - to create a hearty meal including one protein and two side dishes. Tempers flare as both teams struggle with consistency, and every dish counts as the troops will vote for their favorite dish and determine the winning team. Later, the losing team will face an intense pressure test featuring the all-American classic, blueberry pie. Find out whose dessert will prove to be a victory and who will be sent home.

In the next team challenge, contestants must prepare an upscale seafood menu for a beachfront wedding. After an emotional challenge, tensions are high, but both teams complete their dinner for the wedding guests. The team who most successfully finishes the dinner is safe from elimination, while the losing team faces the pressure test featuring a traditional American meal with steak and fries. Find out who will stay and who will be sent home.