Gregg Wallace reveals how the supermarkets get us in the mood for autumn. He finds out what it takes to bring us millions of Halloween pumpkins, learns how own-label pies are made and is let into the hidden world of online supermarkets.

With spring in the air, Gregg finds out what it takes to bring us millions of eggs for Pancake Day, discovers the clever technology behind Easter chocolate and reveals what our eyes tell us about the way we shop.