The Tal Shiar was the intelligence agency of the Romulan Star Empire.
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")
- Tal Shiar article at Memory Alpha, the canon Star Trek wiki.
- Tal Shiar article at Memory Beta, the non-canon Star Trek wiki.