Kevin Ridlon

This season's contestants head to Las Vegas where they participate in the signature dish challenge; the winners of the challenge ride on the world's tallest Ferris wheel while the losers peel 50 pounds of shrimp and 1,000 pounds of potatoes.

The winners of this week's challenge enjoy a wine blending experience, before a disastrous dinner service leads to a shock departure.

The teams have 20 minutes to see which team can produce the most shrimp dumplings; rapper The Game attends the dinner service.

The chefs are given a communication challenge. VIP guests for dinner service include astronaut Buzz Aldrin.

Dinner sees the 12 remaining chefs serving octopus, steak and lobster, but lacklustre performances from both teams leave Gordon Ramsay far from impressed.

Kris Jenner and Dita Von Teese enjoy duck dishes as one team pulls off a near-perfect dinner service.