The Tal Shiar (alternate spelling: Tal'Shiar) was an intelligence agency and secret police service of the Romulan Star Empire. People who served in the regular Romulan Star Navy or the Romulan Ground Forces were sometimes offered Tal Shiar positions. When the official offer was made, they were offered with the opportunity to decline. (TNG video game: Starfleet Command III)

In 2372, the Tal Shiar joined with the Cardassian Obsidian Order in an attack against the Founder's homeworld in the Gamma Quadrant. The attack proved to be a trap, with Colonel Lovok replaced by a Changeling. The joint fleet was destroyed by the Jem'Hadar and the survivors were taken prisoner. (DS9: "Improbable Cause", "The Die is Cast")

It was rumored that the Praetor had Praetorian Guard members within the Tal Shiar, to keep watch over the secret police and report any indications of disloyalty or deception. However, there was talk the Tal Shiar had agents in the Tal Prai'ex as well. Thus, the Tal Prai'ex and the Tal Shiar acted as checks on each other's potentially dictatorial power. Also, either group could make use of espionage ships. The chairman of the Tal Shiar is known as the dhaemnasi. (RIS Bouteina)

In late 2382, the Tal Shiar probed the mind of Captain Markev Riganoff. Later in 2383, after much interrogation, General Kassus ordered the release of Dr. Felix Adar. (Star Trek: Pioneer: "Night Club", "The Forgotten Planet")



Tal Shiar planets/bases/facilities

Special groups within the Tal Shiar

The Euredyce special forces were highly trained agents who had the task of marking targets within enemy territory that were to be bombed. (Dragon Ball Z vs. Star Trek: The Beginning of Infinity: "Times of Change and Times for the Search for Luck")

The Tal Shiar's Special Operations Division was entrusted with the most sensitive missions. Trevak served as the first officer of the SOD's Third Infiltration Brigade from 2372 to 2381. (Star Trek: Remington)

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