Star Trek: The Next Generation
Episode: TNG 240 - Face of the Enemy

Neutral race of mercenaries with cracked-looking skin who are trusted to operate in both Romulan and Federation space. They are empathetically sensible, at least to Betazoids. A freighter captain, however, was lying about taking the Romulan defectors safely away and was killed by N'Vek. A Corvallen was one of the two official witnesses to Noonien and Mariana Soong's wedding.