Sneak peek: "The FBI Declassified": The Spies Next Door

TUESDAY 10/9c: FBI agents track down Russian spies, who seamlessly blended into communities across the U.S.. Agents bugged the spies’ homes, followed their travels, and ultimately cracked their secret communications network, to try to stop sensitive information from getting into the hands of the Russian government. Narrated by Alana De La Garza of the CBS drama "FBI." Watch Tuesday, October 13 at 10/9c on CBS.