Overview: Click looks at the new audio app Clubhouse which has been getting a lot of buzz in Silicon Valley. Is it really the future of podcasts and audio more generally, or another overinflated fad which fizzles and dies? The show investigates. The team also looks at the start-up which is trying to revolutionise training within the ranks of Britain's military - creating a virtual landscape to create simulations in virtual reality. It is starting to get noticed at the highest levels and Click gets access to its final assessment session. And the BBC Micro turns 40 this year. The team looks at how The National Museum of Computing is dusting off the old machine to enthuse the next generation of computing pioneers.