Gary Lineker puts ten celebrities to the test in a challenge competition with a twist - there are no rules and no instructions.

True colours emerge as the celebrities face individual and team challenges. A mystery box offers an advantage, but two face the Duel and only one can survive.

Mind and body are tested as celebrities tackle terrifying challenges. Who will keep their nerve and escape the Duel?

The time for friendship is over as mistrust spreads, sabotage is suspected and a familiar face returns to shake up the game.

As the celebrities continue their voyage into the unknown, risks are rewarded, a mystery box returns and one decision sends shockwaves through the group.

An exasperating challenge sparks conflict and chaos, and tempers flare as accusations fly, with a once-solid friendship being pushed to breaking point. With tensions still simmering, the celebrities are thrown into an anxiety-inducing setting and tested under watchful eyes, and with just five determined contenders left fighting for a place in the semi-final, the stage is set for a tense, giant-killing Duel.