title: Counterintelligence Service
text: # Counterintelligence Service
  
  Counterintelligence Service may refer to:
  
  * Counterintelligence Corps (United States Army) (1917-1961)
  * KOS (Yugoslavia), the Kontraobavještajna služba, the counterintelligence service of the Yugoslav People's Army
  * MI5, the United Kingdom's internal counterintelligence and security agency
  * Internal Counter-Intelligence Service, fictional British military organization from the UNIT audio plays by Big Finish
  