Vorgon

The Vorgons are a humanoid race, capable of time travel by the 27th century.

Vorgon criminals Ajur and Boratus travelled to various points in time to steal the Tox Uthat, a powerful quantum phase inhibitor able to stop all fusion within a star.

The Vorgon fleet, from the 27th century, got involved with the Temporal Cold War in the 29th century, by time-jumping to this future period. They allied themselves with Starfleet in this time and helped to fight the Na'kuhl. (: "Temporal Doom! Part II")