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4/6 The world has ended but Donna, Johnny, Patrick and Abigail still take a bank holiday trip.
BBC Radio 4 Extra
3/6 The last four people on Earth ponder continuing the human race.
BBC Radio 4 Extra & BBC Radio 7
2/6 The last five people left on Earth try to elect a head of the household.
1/6 Housemates Donna, Johnny, Patrick and Abigail discover they are the last people on Earth.