Three all-star judges -- Beau MacMillan, Aarti Sequeira and Justin Warner -- and their moms are ready to shop and cook their way to a $20,000 victory for charity. First, Guy Fieri's mom gives the judge/mom duos a list of mandatory ingredients to feature in a Mother's Day dinner. Next, the chefs throw it back to their childhoods when Guy has them do all the shopping for their childhood favorite using kiddie carts. Mamma mia!

Returning GGG chefs are ready to contest their defeats by taking on their former Flavortown rivals in three winner-take-all grudge matches worth a guaranteed $5,000 each! In the first grudge match, two chefs who were originally forced to team up go head-to-head in a decadent dinner challenge using only ingredients that start with the same letter. In the second grudge match, two chefs from Guy Fieri's Summer Games are back to make a fine dining dinner featuring the ingredient that caused them headaches in their original match-up. In the final grudge match, GGG judge Duskie Estes is back to redeem her surprise loss to fellow judge Troy Johnson by creating a California dinner using nine items or less.