In Scotland off the rugged coast of Cape Wrath, Bear is dropped into open ocean. After getting ashore, he realises he's on an island and must swim to the mainland. Bear fashions a wetsuit from a seal's hide to withstand the frigid crossing. Well into the trek, he is forced to turn back as an incoming estuary tide nearly cuts him off. After he makes it to dry land, Bear has a close call with the steep treacherous Scottish rock terrain

• Bear Grylls