Omegan

The Omegans were a humanoid species native to the Omega system.

By 2266, the Omegans were allies of the Federation, but were considering shifting their alliance to the Klingon Empire. To convince them not to do so, Starfleet Command ordered the USS Enterprise (NCC-1701) to escort Omegan ambassador T'Ki to the Omega system. Although relations between the Omegans and the Federation were nearly sabotaged by a Klingon duplicate of Captain James T. Kirk, Spock was able to expose the plot and convince T'Ki of the Klingons' treachery.