ABC 20/20

Four champions return to the kitchen via personal invitation from judge Scott Conant; a notorious vegetable is a true test in the appetizer basket; in the second round, one chef hits a major hurdle when an ingredient falls to the floor.

Four returning chefs are put to the test by legendary judge Chris Santos for a chance to compete in the tournament finale with Chris as their sous chef; a beautiful ode to bacon is one of the ingredients in the appetizer basket designed by Chris.

Four champions return to the kitchen as favorites of judge Alex Guarnaschelli; in the first round, a French pastry and a flavored fish are two pieces of the culinary puzzle that Alex has devised for her special group of competitors.

Four competitors return to the stoves after being hand-picked as favorites by judge Maneet Chauhan; the baskets that Maneet selects for this battle include a signature Nashville flavoring, an Indian dessert and a frozen cocktail.

The best of the best face off to see who can emerge victorious in the tournament finale fight to win $25,000 in cash, $25,000 for charity and legendary status.

Four chefs bring traditions and pride into play as they celebrate their Hispanic culinary cultures; a sweet surprise and a fungus delicacy make for an interesting appetizer pair; the chefs honor their families' homelands with great fish entrées.

Four feisty chefs showcase their unique personalities on the plate, but a timeconsuming flex threatens one competitor's chances of finishing the first round; the judges get excited over pork and kohlrabi entrees and a fermented dessert ingredient.

Four chefs work with Mediterranean classics to honor their Greek culinary heritage; they feast their eyes on a special cookie which appears to be staring back, get a leg up with their lamb entrées and are inspired by nostalgic favorites for dessert.

Competitors race to turn mystery ingredients into three-course meals; its all about skill, speed and ingenuity and only one chef will impress the judges enough to survive the chopping block.