Therbia was an inhabited planet. This was a non-Federation planet. Lieutenant Commander Rene Echevarria, a crewmember aboard the USS Enterprise-D, was from this planet. In 2369, this planet was listed on the chart "USS Enterprise Personnel Database", which was displayed on a PADD used by Captain Jean-Luc Picard on aboard the Enterprise-D. (TNG: "The Chase" , production art)