Ice Dwellers - S2.E26

Pursued by Arak's forces, the trio enters an icy region and stumbles upon a friendly Inuit tribe of the Igalaks led by wise Takanuk, who live in such total seclusion that they don't even know about the apocalypse or Kortan. Arak locates them, so Ramirez uses an ancient submarine that the Inuits have found in the ice to try to stop him.