Active Six was a Federation black ops team sent to the planet Jevalan by President Pro-Tempore of the United Federation of Planets Baras Rodirya and Admiral Declan Schlosser to prevent Doctors Beverly Crusher and Ilona Daret from uncovering proof that Baras was an imposter who had assumed the identity of Ishan Anjar. The team was led by Jacob Barrows.
Thanks to the timely assistance of Thomas Riker Barrows and Active Six were kept from carrying out their mission. Barrows and the surviving members of Active Six were arrested along with Admiral Schlosser. Baras himself was arrested by attorney general Phillipa Louvois in front of the Federation Council. (ST - The Fall novel: Peaceable Kingdoms)