Kago-Darr

From Memory Alpha, the free Star Trek reference.

Kago-Darr was a bounty hunter in the 2150s and long-time rival to Skalaar.

In 2153, he attempted to capture Captain Jonathan Archer from Skalaar in order to collect a bounty from the Klingons for himself. Archer convinced Skalaar to temporarily free him so he could pilot the ship while Skalaar made repairs. With Archer's help, Kago-Darr's vessel was disabled, allowing Skalaar's ship to escape. (ENT: "Bounty")

Kago-Darr was played by Robert O'Reilly, better known for playing Gowron.

The name Kago-Darr is very similar to Ka D'Argo, one of the main characters from the science fiction series Farscape, indicating a possible allusion.