In Palm Springs, model Chrissy Teigen entices the contestants to make their best ``date'' dishes; the chefs cater a wedding for 25 gay couples in an elimination challenge.
In San Diego, the chefs cook up high-end tacos for Mexican chef Javier Plascencia; at Juniper and Ivy, the contestants serve up mouthwatering dishes to complement their handcrafted microbrews.
The 10th anniversary of the show is celebrated as the chefs battle it out using only 10 ingredients.
The chefs have to make some visually appealing 'food porn' using only snack food.
During the Restaurant Wars, the chefs have to open their respective restaurants for both lunch and dinner services.
Having prepared a full lunch service, the chefs then have to clean up and do it all over again for dinner customers.
The chefs are in San Francisco's Chinatown, ending up at at chef Martin Yan's M.Y. China restaurant, where they use woks. Umami Burger restaurateur Adam Fleischman wants the chefs to come up with their own fast-casual restaurant concept.