Hannah Fry takes a look at the bank card, the digital key to accessing cash.

Hannah Fry tucks into the tech behind food delivery apps.

Hannah Fry delves into the inner workings of virtual assistants.

Hannah Fry discovers why innovations in meat packing almost derailed the electric car.

Hannah Fry finds out how 1970s car crashes helped us to count our steps.

Hannah Fry visits eBay authentication, where they are waging war against fake trainers.