Kago-Darr was a bounty hunter active in the mid-22nd century.
In 2153, Kago was contacted by Captain Goroth, a Klingon soldier who was attempting to apprehend Starfleet captain Jonathan Archer, who was considered a fugitive in the Klingon Empire. Goroth offered Kago a large reward for Archer's capture, spurring Kago to attack his longtime rival Skalaar, a fellow bounty hunter who had succeeded in apprehending the Starfleet officer. With Archer's help, Skalaar was able to disable Kago's vessel, forcing him to make an emergency landing on an L-class planet. As Kago was making repairs, he was contacted by Archer's crew, and informed them of the fact that Archer had a bounty placed on him by the Klingons. (ENT: "Judgment")
Kago-Darr was played by Robert O'Reilly, better known for playing Gowron.