Episode 4

After not one but two shock exits, and some new faces on board, the X-bus crosses yet another border and makes its way to a country famed for music and rolling hills. The new passengers are dumped in at the deep end as host Rob Brydon arranges for everyone to spend a night in a spooky castle. It's a race through the rooms to gather clues and make it to the room with a view to finally see where they actually are. Another challenge high on a hill tests the passengers' memories, and the bus seems even more divided than ever, with the original players closing ranks against their new bus mates.