Have you ever wondered what’s inside the machines you use so often in your daily life? How does a chainsaw slice through hardwood like a hot knife through butter? What makes a fishing reel strong enough to pull in the big one? And what gives the jukebox its distinctive sound? Using ultra-realistic 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.