Highlander: The Animated Series (1994)

S2E6 The Secret Prison

Kortan captures the three friends, imprisoning them in his inescapable unisex cell, where the captives undergo brainwashing to revere him and enlist in his army of hunters. Determined to free the inmates, the trio works to liberate them both physically and mentally. In the process, Arak's intriguing backstory comes to light.