The last five celebs are put through two gruelling tasks, before being sent on the run for an escape and evasion manhunt. Who has the mental resolve to make it to the end?

The recruits compete in three brutal challenges that test their leadership skills. First they must construct a zipline, then go head-to-head in murderball, and finally they must work out how to pull a 200kg sled loaded with equipment up a revine.

The last five recruits are on the run from a specialist hunter force who are trying to track and capture them. If captured, the recruits will face the most psychologically demanding of all the phases, interrogation.

14 celebrity recruits face the toughest course to date, played out in the unforgiving terrain of the Jordanian desert. The recruits face an intense start to the course, crawling through sand in blistering 40-degree heat, before facing a gas attack.

The recruits take on the gruelling task of moving a broken-down one-tonne Jeep in searing heat and through thick sand. Then the celebs must balance on ropes 160 feet above the ground to cross a ravine.

The recruits must make split-second decisions about whether to shoot in a simulated warzone. Then the recruits are forced to dive backwards from a seven-metre platform into the Gulf of Aqaba in the dead of night.

The remaining eight celebrities must pull themselves across a 300-foot-wide ravine, before dropping 160 feet to the extraction point. Then to weed out the weakest recruits, the celebs take a midnight beasting, and make an emotional call home.

The celebrity recruits must jump from a helicopter in pairs. Next, they take the life of a teammate in their hands as one of them free-falls from a 150-foot cliff, being kept from crashing to the ground by their partner.

The celebrities face the penultimate survival phase of the course, where they prepare for life on the run behind enemy lines. An ambush triggers traumatic memories for AJ Pritchard. Messages from home threaten to unsettle the recruits ahead of the escape and evasion phase, while Calum Best leads his team astray as they try to avoid capture by a relentless Hunter Force

Celebrities who think they have what it takes to pass the SAS selection are pushed to their limit by an elite team of ex-special forces operators. Fifteen recruits from the worlds of entertainment, sport and journalism take part in the hardest course yet, as Chief Instructor Billy and his team expose them to winter warfare training on New Zealand's South Island. For their first task, the celebs must traverse the Trainasium - parallel metal bars suspended 335ft in the air. Then, the recruits' mindsets are tested under extreme pressure when they stage an intense hostage rescue mission.

Twelve celebrities head out for the wilds of the Scottish Hebrides for a series of full-on challenges in a gruelling version of the SAS selection, including an aerial assault course.

The recruits face an escape from a simulated helicopter crash in near freezing water.

It's time for some true grit, an ambush, dead-of-night escape and mud wrestling

The 12 celebrities take on hand-to-hand combat, then put their wits to the test in a hostage rescue mission. With tension mounting, two of the recruits are soon heading home.

The celebs do pair work as they descend 100 feet down a rock face, force march and carry a 40kg fuel drum over rough terrain. By the end of all this, some will be heading home.

The celebs are paired with an 'oppo' for support. But then they have to fight each other.

The recruits must protect a VIP on a journey through the wilderness.

The spotlight focuses on the Special Forces' high levels of discipline. In the first task, a terrifying feat tests the celebrities both mentally and physically as they race in a forward abseil down a 300-ft working dam. Then, under cover of darkness, the recruits must perform one of the most feared tasks - the backwards dive. Will the celebrity recruits conduct themselves in the manner required?

After a plunge in freezing mountain water the celebs must take on the Redman.

The celebs are ambushed as they battle to complete the course.

The recruits are put in pairs to eat, sleep and work as a duo, including a 60-metre cliff drop together. Can leaders Joey Essex and Lauren Steadman do teamwork or are they at risk?

The celebrities are paired up to prove that they're team players, and must put their lives in each other's hands, in a terrifying free fall abseil. They must leave their celebrity world behind and learn to trust their partner to keep their place.

16 celebrity recruits are pushed to their limit in the unforgiving Vietnamese jungle. The new recruits must first traverse parallel metal bars suspended 50 feet above the ground. Then they must fight against each other in the rawest form of combat.

From the recruits' very first challenge - a terrifying backwards dive out of a helicopter - Ant Middleton and his team are determined to show there will be no allowances made. Later, the celebrities have to overcome more fears.

As the pressure is piled on, one recruit cracks and a bad decision puts another's place on the course in dire jeopardy. After being pursued through the Chilean countryside by a military hunter force, the recruits enter the interrogation phase.