Home cooks present dishes to the judges.

Home cooks present dishes to the judges.

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.

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

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

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

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

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

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

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

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.

A meal is prepared for a wedding party.

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

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

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

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

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

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

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

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

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

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