I watched the Australian version of it since that is where I live. At least I think there is an American version as well. It's a reality show. Where 2 people find these ringing phones and answer them and are told they can win an amount of money (i think 25 grand, i cant remember). Then the 2 people meet up and work together to find clues or something and do it in a certain amount of time. And if they don't finish the activitie when the time is up then money is taken out of their reward. And then near the end the 2 have to split up and find the money themselves. Then whoever gets the money first has to decide if they will keep it all or split it with the other person. Does anyone know what this show is called???