Paul Morris from Harrogate believes he's cracked the genetic code of an acorn to make genetically engineered pig feed. Is it a ground-breaking discovery or will the Dragons think it's all hogwash? Mike and Sarah Longthorn, and Laura Booth from Hull think they have the perfect welly for festival fashionistas braving the mud. Inventor Ehsan Yazdani from London shows off his portable mini gym for fitness fanatics on the go, but can he convince the Dragons that his business is in good shape? And if that wasn't enough, Reverend John Berriman from Cornwall has invented a new flavour of fizzy drink with a very unusual ingredient. It's time for a Dragon taste test - will the Reverend pass or fail?