The remaining recruits are tasked with submerging themselves in icy water and then simulate infiltrating enemy infrastructure by racing each other down a 330 foot dam.

Recruits must unlock a safe in a gas-filled room, perform a helicopter insertion into the blistering cold sea, and select recruits are forced to bury their teammates into coffins after cheating in a previous challenge.

The recruits find themselves back in the water with one of the most physically challenging tests thus far; as the group forms a deep emotional bond with one another, one recruit has a shocking exit.

Sixteen household names arrive in the desert, about to endure some of the harshest, most grueling challenges from the playbook of the actual Special Forces selection process.

The DS test the remaining recruits with a chemical warfare challenge; celebrity contestants reveal their personal stories that led them to signing up for the show.

The final group of remaining recruits attempt to go behind enemy lines without being captured, and face tough lessons of survival, leadership and how to decipher a map.

The recruits face a skyscraping tactical repel and a high-pressure simulation.

A new troop of 14 household names face the harsh reality of winter warfare training.

The celebrity recruits are put to the test of safely protecting a convoy under a surprise attack.

As a test of their character, they are tasked with a 2-mile race, navigating treacherous terrain, while carrying a 220-pound boat.

The remaining recruits are taken to the top of a mountain range to face the most demanding exercise of selection so far using a single rope to crawl across a deadly ravine.

The recruits are captured and taken into their final stage of selection: 12 hours of military-grade interrogation; resistance and the will to survive are key, and only the strongest recruits pass the course.

FOX's ultimate celebrity social experiment, Special Forces: World's Toughest Test, returns for a third season, enlisting a troop of household names to endure some of the harshest, most grueling challenges from the playbook of the actual Special Forces selection process. This time around, the recruits will be training in Wales, the home of British Special Forces Selection, and will endure the harsh reality of ocean warfare. On their way to base, and with hardly any time to get acquainted, the new recruits are faced with their first challenges which include taking a mighty leap out of a moving boat onto a helicopter, testing their endurance by treading water as a group and bungee-jumping off a 12-story viaduct.

Challenges include treading water as a group and bungee jumping off a 12-story viaduct.

The recruits face new challenges including escaping a boat crash and an intense combat exercise.

The recruits must trust each other in order to survive.

Contestants take on a search-and-rescue course, crawl over a rope spanning a canyon and face a brutal three-stage endurance test

The recruits undergo a search-and-rescue course, crawl along a rope suspended over a canyon, face a grueling three-stage endurance test in the mountainous terrain, and a brakeman rope challenge.

As the recruits experience the most challenging part of their journey, they must try their best to conceal that they have been working with the Special Forces in order to successfully pass selection.

The recruits are faced with an emergency escape drill; tensions begin to arise as the recruits confront each other over disagreements and the pressure of the selection process becomes too much to handle for some.

The celebrity recruits must have trust in each other and in their leaders in order to survive; each recruit must rely on another to break their fall from a skyscraping cliff.

The celebrity recruits learn a valuable lesson in using fear to inform and help.

Celebrities endure some of the harshest, most grueling challenges from the playbook of the actual special forces selection process; their goal is not to win votes and face eliminations -- for them it is just about survival.

The last remaining recruits face their final phase -- enduring the mental duress of enemy interrogation.

The recruits face the most dangerous task yet, a helicopter survival drill, as a test of their ability to mentally handle a life-or-death situation.