Also known as the Security Service, MI5 is the United Kingdom's domestic counter-intelligence and security agency, dealing with threats inside the kingdom. However, recent revelations have shown that, in some cases, the organization may have helped to aid and abet some crimes in the course of (theoretically) preventing others. Tune in to learn more about the morally grey world of covert operations and MI5.They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/See omnystudio.com/listener for privacy information.