Australian Survivor TEN, 7.30pm

When you’re living on a tropical Samoan island, fire might not seem like the biggest key to your survival. You’re hardly likely to need its warmth when even night-time temperatures average 25C, are you? But if you want a half-decent meal, then sorting out a source of flame is going to be pretty high on your survival to-do list. So it’s kind of a big deal that one tribe is struggling to get a fire going. With tribe moral also far from sparking, the only thing for it seems to be a win in the Crab Pots immunity challenge – which involves collecting puzzle pieces from a submerged cage, then completing the puzzle on the beach – so they can barter for some flame.