In episode one, it's the mega brands versus the dupes. There are not many people on this planet who haven't heard of Coca-Cola. It's the biggest food and drink brand in the world, with the recipe of their famous signature drink a closely guarded secret. Surely a supermarket own brand can't concoct a drink that rivals or even beats the taste of Coca-Cola for a fraction of the price!! Or can it? We put seven dupe colas up against the might of the American giant.We meet the people who are already converted and brand loyalists that think you can't compromise. Then there's the names. It's not good enough tasting similar - the own brands have to look and sound similar too. Resident dupe superfan Eggsy takes a look at some of his favourites.And the rivalry heats up as we look at cereals and The Big Mac. And even cats want a say on the matter! As the own brands cause a storm we get a food scientist to show us how the supermarkets are able to challenge the superbrands at a fraction of the cost. With the addition of quick-fire taste tests, the competition is unrelenting. Across eight rounds they battle it out to see who comes out on top.