Intelligence agency
An intelligence agency was a type of government organization whose functions included conducting espionage and counterintelligence, and typically operated covertly. Some intelligence agencies also functioned as secret police. Intelligence agencies made use of undercover operations, and its employees could be referred to as intelligence officers, agents, operatives, or simply spies.

The Tandaran intelligence agency was aware of the Broken Bow Incident as of 2152. ()

Intelligence agencies by affiliation

Earth 
British Intelligence
CIA
FBI
Gestapo
KGB
MI5
NSA
(See also "Section 31", below)

V'Shar
Vulcan Intelligence

Romulan Star Empire 
Romulan Security
Tal Shiar

United Federation of Planets 
Federation Security 
Starfleet Intelligence
Internal Affairs
Section 31

Other powers 
Bajoran Intelligence
Dominion Intelligence
Idanian Intelligence
Imperial Intelligence
Klingon Intelligence
Prytt Security Ministry
Maquis Intelligence
Obsidian Order
Cardassian Intelligence Bureau

External link 
 

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Agencies