Alliances are formed and broken as Boomer leads 6 contestants through 3 challenges on the land, air and sea. In the end can the brains beat the brawn?

6 contestants have their will tested through challenges featuring pain, surprise and lots of mud. An injured knee leaves one of the contestants worrying if they can even go on.

6 air cadets from The 180th Mosquito Squadron battle it out at Boomer's base camp and get a taste of Adrenaline Project-style boot camp. In the end only 1 gets promoted to the rank of "Semi-Finalist".

6 contestants battle each other, along with bugs and the local fire department as they fight it out for a spot in the semi-finals.

6 beauty pageant queens arrive at Boomer's base camp to prove that they are more than just sashes and tiaras. Questions are raised on one beauty queen's willingness to compete.

6 contestants are forced to compete in boats, in dirt and all locked up. Facing their fears becomes the key to moving on in one challenge.

Extreme athletes from motocross racers to wake boarders fight it out at Boomer's base camp. A 300-pound pro wrestler is thrown into the mix to shake things up.

Family dynamics come to the forefront as 3 sets of twins find out quickly whether or not they compete better together or head to head.

Upsets and alliances take centre stage at Boomer's base camp. A competitor must face their biggest fear in order to move on.

6 competitors, from different martial arts disciplines, arrive at Boomer's base camp. They soon learn that this is tougher than any dojo they've ever competed in.

Winners from previous episodes return to compete again. As the stakes get raised so does the intensity of the challenges.

The next set of past-winners compete for a spot in the finals. The intensity heats up as the stakes get bigger and bigger.

The skier vs. the hockey player. The 2 finalists battle it out for a huge grand prize and the title of this year's Ultimate Adrenalite.

6 new contestants arrive at Boomer's base camp, each looking for that first spot in the semi-finals. The competition heats up when it quickly turns into a battle of the sexes.

6 competitors face challenges set up by Boomer on the land, on the sea and in the air. A Painful second challenge sends 2 contestants to the final round.

Siblings and cousins compete together and against each other for a spot in the semi-finals. Some find out quickly that family is not always more important than victory.

6 contestants arrive at Boomer's base camp but must overcome a stomach churning challenge in order to move on. An injury to one competitor could hamper their shot at the semi-finals.

Poor teamwork means the end of the line for 2 of Boomer's competitors. Overcoming mud and water sends one contestant to the semi-finals.

Dominating the first challenge leads to contestants 2 to completely dismiss the other competitors' chances of winning.

6 Cheerleaders arrive at Boomer's base camp, ready to prove that they are more than just pom-poms and cartwheels. Battle lines are quickly drawn between rival cheerleading squads.

6 models lose their make-up and their hairdryers and try roughing it at Boomer's base camp. A serious injury becomes costly to one high fashion competitor.

An over aggressive wrestler leaves his mark at Boomer's base camp. Emotions run high as alliances are formed and then broken.

6 scouts learn quickly that they need to be more than just prepared in order to win at Boomer's base camp. A planned alliance may be the deciding factor as to who moves on to the semi-finals.

The second round of past-winners return to see who will earn a spot in the finals. As the stakes get higher, the challenges become more and more intense.

The tough, cocky wrestler vs. the quick and wily football player. One of them walks away with a huge grand prize and the title of this season's Ultimate Adrenalite.