The first of five programmes Introduced by Bernard Falk
Two teams, one from Oxford, the other from Cambridge, accept the challenge to cope with the unknown for 24 hours in the open.
Their mission is to retrieve an isotope from a fallen satellite and it is a race against the clock. And that's a long way away yet.
Tonight's problems include finding a tape recorder buried in the sand. leaping into icy water to retrieve some canisters, making a generator, flying a kite.
BBC Pebble Mill