One day in May 2017, computers all around the world suddenly shut down. A malware called WannaCry asks for a ransom. The epidemic suddenly stops, because a young, British researcher finds a killswitch, by accident.

An exclusive Tomorrow Unlocked documentary. #hackerhunterseries

Watch all episodes of the hacker:HUNTER series here: www.tomorrowunlocked.com/guardians/hacker_HUNTER/