With just four passengers left on board, the X-bus travels further into Europe and one step closer to that £100,000 prize. After thousands of kilometres, which of the semi-finalists will fall at the last hurdle?

Old alliances are tested as host Rob Brydon puts the remaining players through more devious challenges and has them hunting through mines for clues as well as looking to the stars for an advantage that could push even the strongest players out of the game.