Brian Cox and Robin Ince shuffle through the archive to find the smallest things in the world of science, from a particle so tiny nobody has ever actually seen it, to the millions of microbes we’re all made up of. They ask the short-of-stature comedian Andy Hamilton how he’d feel about being three times bigger, which he admits could come in handy if he ever met a mammoth, leading to an unexpected discussion about a potential new TV gameshow format. Entomologist Erica McAlister is back to tell the team about her favourite fly, which can burrow into a human head to lay its eggs, and we learn about a project to make ants glow in the dark using nano-gold which went a little bit wrong.

New episodes will be released on Wednesdays. If you’re in the UK, listen to the full series on BBC Sounds: bbc.in/3K3JzyF

Producer: Marijke Peters Executive Producer: Alexandra Feachem

Episodes featured: Series 16: What particles remain to be discovered? Series 19: Microbes: Secret rulers of the world? Series 6: Does size matter? Series 23: In praise of flies Series 24: Astronauts