Appeared In: Thunderball, 1965
Used By: James Bond

Breathing underwater is something James Bond's had to do in numerous missions, and it's always been possible thanks to the mini contraption called the Rebreather. Appearing in the fourth Bond film, many wondered if the Rebreather was real, as most Bond gadgets at the time were based on existing tools and weapons. But it's size, and the lack of an airbag, made a real-life counterpart all but impossible to create.