A new series of Bear Grylls survival show kicks off tonight with 16 new contestants left on a remote, uninhabited Pacific island for a month, to see if they can use teamwork to survive. In this opening episode, the two groups - one of eight men and the other of eight women - are abandoned on opposite sides of the same island and must swim to shore and search for drinking water. The women find a huge lagoon, but drinking from it could prove to have severe consequences, while tensions mount among the men as they fail to find a suitable place to set up camp. We seriously don't know why anyone would want to put themselves through this, but fair play to them all the same.