Men in Black (MIB) (1997)

While pursuing a suspect, NYPD detective James Edwards III is puzzled when the suspect displays two sets of eyes and a peculiar raygun. He is afterwards asked to make an identification by the mysterious K. K is impressed and asks Edwards to report to the organization he works for. There Edwards is recruited into the Men in Black, an ultra-secret organization that patrols alien immigrants on Earth and protects the safety of ordinary citizens by preventing them from ever finding out by using a memory neuralyzer to blank people's memories of anything they see. Edwards's identity is erased, he now known only as J, and he given a standard issue black suit and a pair of sunglasses that protect him from the neuralyzer. But as J starts learning about the job, he and K find themselves facing a threat to the Earth.