John Lloyd is joined by another new curator, Sarah Millican, to present this special episode about coding as the Museum takes a trip up to the Edinburgh Fringe. On the steering committee are the Festival of the Spoken Nerd's Matt Parker, CEO of Raspberry Pi Eben Upton, and Canadian graphic novellist Sydney Padua.

Sydney Padua, Canadian graphic novellist and animator, who has worked on films like John Carter and Clash of the Titans, and author of best-selling steampunk graphic novel The Thrilling Adventures of Lovelace and Babbage: The (Mostly) True Story of the First Computer, donates to the Museum Charles Babbage's Analytical Engine, which is a bit of a problem because he never got made. If the machine were built it would have even had its own error pop-up message.

Eben Upton, the inventor of the "Raspberry Pi", a computer the size of the credit card which is the fastest-selling British personal computer in the world, offers The Museum a BBC Micro computer, the standard computer in schools for in the 1980s.

Matt Parker, Australian comedian and ex-maths teacher, member of the Festival of the Spoken Nerd, and whenever asked by lazy interviewers what his favourite number is gives a difference answer every time, gives a Williams-Kilburn tube, a cathode ray tube that helped to move computers from gigantic machines to more electronic ones. It was responsible for RAM and the Manchester Baby.