Mortal Kombat Defenders of the Realm Episode 5 - Old Friends Never Die Episode Title:Old Friends Never Die.Episode Description:Sub-Zero goes out to meet with his friend Smoke, who unexpectedly returns after being gone for many years. Sub-Zero and Smoke were best friends before Oniro, the Grandmaster of the Lin Kuei clan, gave the order for automation of the ninjas. Sub-Zero managed to escape this fate, but Smoke was captured and transformed. Now Sub-Zero wants to know if his old friend has retained a human soul, or if he became only a machine for murder. Smoke's orders are to annihilate Sub-Zero and he nearly succeeds, until he suddenly realizes that he has retained his soul, and fights alongside his friend Sub-Zero once again. They team up to drive Oniro away, and though Smoke will not befriend Sub-Zero again since the latter is an enemy of the Lin Kuei, he honors their past oath to never fight each other in combat, and then disappears.