An uninhabited planet holding ruins of the Debrune, an ancient offshoot of the Romulans, where mercenaries stripping the site seized Riker in 2370.
Barradas III is an uninhabited planet with extensive remains of a Debrune outpost. The Debrune were an early branch of the Romulan people, and the ruins are about two thousand years old. The planet appears in the seventh-season Next Generation episode Gambit, Part I.
Believing Picard to have been murdered, Riker follows the trail of the supposed killers to the Barradas system in 2370 and leads an away team down. They find signs that the site has been recently looted with great care, and are then attacked by armed mercenaries. In the fighting Riker is stunned and carried off to the raiders' ship.
There he discovers Picard alive and posing as one of the crew. The looters, led by Arctus Baran, are collecting specific artefacts from Romulan-related sites to reassemble an ancient Vulcan psionic weapon.