Have you ever wondered what’s inside the machines you use so often in your daily life? How does a tennis ball launcher fire balls as fast as a pro? What makes a music box play beautiful music, without electricity? And how does a safe stop thieves, but still let its owner in? Using ultra-realisitic CGI animation, this episode ‘explodes open’ everyday machines into their individual parts, to reveal their secret workings. Combined with stunning footage from the factories where these objects are designed, built and tested, this compelling program uncovers the mysteries of machines and how they work.