The final two cooks prepare three-course meals; the judges choose the winner.

The remaining three contestants cook more sophisticated versions of the dishes they made in their initial auditions.

The cooks split into two teams for the mystery box challenge.

Two cooks advance to the finals while the remaining three face a pressure test.

The judges are joined by their sons, who help critique a mystery box challenge; re-creating a dish.

The cooks must re-create popular dishes served at a fine-dining restaurant in downtown Los Angeles; the losing team must prepare a perfect plate of fried calamari with a side of marinara sauce.

The cooks must prepare a T-bone steak dish; the challenge winner assigns a type of poultry to the other contestants.

Previously eliminated contestants get the chance to get back in the competition by perfectly frying an egg and preparing a salmon dish.

The cooks create dishes inspired by loved ones; tag-team sushi challenge.

The cooks compete in an overnight challenge; the losing team faces a spun sugar dessert pressure test.

The nine remaining contestants make sausage link dishes using a sausage maker, with the winner choosing the ingredient to be used in the canned versus fresh challenge.

The contestants must prepare fish tacos for hungry surfers; in a pressure test, contestants must prepare a perfect chicken breast three different ways.

Restaurateur Eva Longoria selects Mexican-inspired ingredients for a mystery box challenge.

A meal is prepared for a wedding party.

The contestants deal with a mystery-box challenge that involves an unusual ingredient and a limited pantry; Season 3 winner Christine Ha surprises the chefs.

The contestants prepare a meal for the cast and crew of "Glee." Jane Lynch, Cory Monteith and Matthew Morrison serve as judges.

A mystery-box challenge involving foreign ingredients takes place; chef Lidia Bastianich judges pasta dishes.

Four cooks prepare burger dishes at Gordon Ramsay BurGR in Las Vegas.

The cooks prepare a steak meal for firefighters; the challenge losers cook eggs benedict.

The cooks must prepare a dish using mystery box ingredients, which include cod; two contestants are sent home.

The cooks must create a healthy meal for over 300 school children.

The top 19 contestants face a mystery box challenge; the contestants face elimination.

The judges pare down the competition in the final round of auditions; the cooks take on a lamb challenge; the top 19 contestants face a mystery box challenge; the contestants face elimination.

Home cooks present dishes to the judges.

Home cooks present dishes to the judges.