Hannah Fry uncovers the secrets behind the miraculous technologies of the modern world, revealing the mind-blowing stories behind their invention.　　Episode 1: Bank Card　　Hannah Fry takes a look at the bank card. This humble piece of plastic is often taken for granted, but it's the digital key to accessing cash and is packed full of extraordinary technological innovations.　　Episode 2: Food Delivery App　　Hannah Fry tucks into the tech behind food delivery apps, which are now used by 24 million people in the UK. Hannah finds out how pizza made us fall in love with the internet.　　Episode 3: Virtual Assistant　　Hannah Fry delves into the inner workings of virtual assistants like Amazon's Alexa, Google Assistant and Siri, which are now found in almost half of all UK homes.　　Episode 4: Electric ...