In this episode we slip into a Bluetooth headset that muffles every message you send except “I’m a douche”, and we discover a personal safety device that won’t summon help but may very well annoy your attacker into killing you faster. We also discover a device that can wipe a laptop nearly as fast as the cops can kick down a door and handcuff you.

Plus, Blake takes us on a joy-ride in the innovation time machine to discover what the Babylonian shipping industry and the Great Fire of London had in common.