A barren planet in the mirror universe that shelters a coalition of rebels against the Terran Empire, visited by Michael Burnham in the Discovery episode The Wolf Inside.
Harlak is a desolate world in the mirror universe which hides a camp of the resistance to the Terran Empire. It appears in the Discovery episode The Wolf Inside.
Posing as the captain of the ISS Shenzhou, Burnham is ordered to destroy the base from orbit. She beams down instead with Ash Tyler, hoping to learn how Klingons, Vulcans, Andorians and Tellarites manage to work together. The rebels are led by the mirror Voq, called the Fire Wolf, with the mirror Sarek as the Prophet at his side, and a mind meld convinces Sarek that she means no harm.
The meeting unlocks the Klingon identity buried in Tyler, who attacks Voq. Burnham still gives the rebels time to evacuate, but the Emperor's flagship arrives and bombards the planet before the Shenzhou can stage its fake attack.