The chefs return to their suite after Judges' Table to find a note along with the entire box set of "The Modernist Cuisine" by Nathan Myhrvold. He will be the guest judge and the 6-volume set of books is their homework. For the Quickfire, the chefs must create something that's impressive and creative, but also tastes amazing. For the elimination challenge, the chefs split into teams and face off in an ultimate BBQ showdown. After all, what's more Texan than a good ol' fashioned BBQ? The fans will decide which team has the best BBQ. Guest judge Nathan Myhrvold joins Gail Simmons, head judge Tom Colicchio and host Padma Lakshmi.