The Mikhal outpost was a rugged planetary base used by the Mikhal Travellers, a loose company of explorers, where Kes fell for the pilot Zahir and the Doctor's altered programme turned violent.
The outpost appears in the third-season episode Darkling. Voyager stops there to learn about the space ahead from the Travellers, wanderers who trade stories of their journeys and seldom stay anywhere long.
Kes is drawn to one of them, Zahir, and considers leaving the ship to travel with him. Meanwhile the Doctor has been grafting the personalities of historical figures onto his own programme, and their darker traits combine into a cruel second self.
This alter ego attacks Zahir, throwing him off a cliff, paralyses B'Elanna Torres and abducts Kes, meaning to flee the planet with her. Cornered on a precipice, he jumps with her; both are beamed to safety and the additions are deleted. Kes stays aboard.