When the conqueror called Over-Mind gained mental control of the Squadron Supreme, Hyperion was the only member of that team powerful enough to resist.
Escaping from his home dimension, Hyperion found help from the Defenders. The group's extensive lineup at the time consisted of Dr. Strange, Sub-Mariner, Hulk, Silver Surfer, Valkyrie, Nighthawk, Son of Satan, Gargoyle, Beastand temporary associates Scarlet Witch and Vision.
The Defenders accompanied Hyperion back home to square off against the mind-controlled Squadron Supreme in a high-stakes battle with plenty of surprises (Defenders #113).
- Dr. Spectrum used energy from his Power Prism to create a giant hand that grabbed Silver Surfer's board out from under him. The giant hand beat Surfer hero with his own board until the cosmic champion got back on his feet and retaliated.
- Tom Thumb boasted that his Quadra-Titanium Bands could enwrap and entrap any man—until the Hulk broke free from the metal straps and knocked out the super-inventor.
- Amphibian claimed to be unbeatable underwater. But during their fight, Sub-Mariner proved to be the water-breather supreme.
- Lady Lark's siren song immobilized several of the Defenders. So Dr. Strange countered with his own melodic magical words.
By Eternity's timeless cry
Let a Sphere of Silence now appear--
and cause this song to die!
Other Defenders defeated the remaining members of the Squadron Supreme without as much hoopla. But victory over the Squadron brought the Defenders even greater troubles.
At the end of the #113, the hoard of heroes were left facing an even greater threat in Null—The Living Darkness!
The Nighthawk who accompanied the Defenders on this mission was actually his counterpart from the Squadron Supreme.