Legion of Super-Heroes #271

The Legionnaires discover that the Dark Man is a clone of Tharok, and they form a temporary alliance with the Fatal Five to defeat him.

Timber Wolf faces the Dark Man, who looks exactly like Tharok but without the robotic components. He soon places Timber Wolf in a trap while Light Lass finds a computer that shows a video behind the secret of the Dark Man: he's actually a clone of Tharok. Meanwhile, the Fatal Five decide to get the assistance of Saturn Girl to help Tharok, who has been suffering from severe headaches ever since he met the Dark Man. After she helps Tharok, the Fatal Five, Saturn Girl and Lightning Lad team up to defeat the Dark Man. Tharok and Dark Man charge against each other and in a bang, they both disappear. Meanwhile, Marte Allon, Colossal Boy's mother, has won the election and is the new president of Earth.