Sara Pascoe, Johnny Vegas, Ninia Benjamin and Ahir Shah accept host Tom Allen's challenge to set up four brand-new nations and give their islands a name and - crucially - a drink.
Tom Allen and friends muse on the joys of dream desert islands. The panel choose a favourite endangered animal, and nature presenter Michaela Strachan makes a guest appearance.
Tom Allen hosts the game show that makes being shipwrecked tolerable. It's time for the comedians to design their flag, choose a house band, and make one thing free to all their islanders.
Cast off - and away - with the game show hosted by Tom Allen. The comedians are choosing a mode of transport, a national sport, and a national anthem to sing right before kick-off.
Tom Allen and his celebrities delve once more into their desert island dreams. The islands are finally getting theme parks, but what theme will they choose? The islanders also discuss toast.
Tom Allen oversees more dream desert island discord. The comedians put their forgery skills to the test as they recreate classic works of art and choose their island's footwear.
The islanders have enough stuff to put on their island, so it's time to ban something - what really gets their goat... if they have goats? Spoiler alert - they haven't got goats.
Tom Allen hosts the comedy game show. It's finale time - who will be crowned the winner, and are some of their choices about to come back and haunt them? (Yes, yes they will.)