
Habitat was the major theme exhibition of the 1967 Montreal World Exposition. As a landmark state-of-the-art project, it pioneered a vision for urban housing. Based on this revolutionary design, another far grander metropolitan complex would be developed in Quebec, Canada, one that drew the attention of the most ancient adversary of antiquity and fearsome foe of the future. The experimental City of Tomorrow… which one monster sought to destroy and one madman sought to plunder. And each city, along with its tremendous technology, impacted crisises on Earths One and Two which the Greatest Heroes of Parallel Planets had to face together.
On Earth-One, the City of Tomorrow was the target chosed by the ancient adversary of humanity, King Kull, to be the start of his devastating attack on that world. Having tried to use his wonderous weaponry and supervillain sycophants to destroy Earth-Two and his native Earth-S, in both instances having failed, Kull focused all his attention on the homeworld of the Justice League. Installing a mechanism designed to speed up Earth-One's rotation in order to disrupt its gravity, Kull's device was disassembled by both Earths' Green Lanterns with aid from their Earth-S counterpart Ibis the Invincible. Together with the Flash and Mercury/Kid Eternity of three Earths, Kull's mechanical menaces Brainiac and Mister Atom were also disabled, allowing the League, Society and Earth-S' Squadron of Justice to finally confront and defeat King Kull himself at the Rock of Eternity.
Years earlier on Earth-Two, a visiting sinister scientist known as T.O. Morrow used his time scanner which peered into the future of that world along with his fourth-dimensional grappling hook (devices previously discovered by the Nazi inventor Helmut Streicher*) to steal gadgetry from the City of Tomorrow found in that planet's Quebec. With these cutting edge devices, Morrow and his minions engaged in a cross-dimensional crimewave. Peering once more into the future, he realizes replicated a sentient computer to service his nefarious needs. Morrow developed an army of androids including Red Tornado to eliminate first the Justice Society and later his old foes in the Justice League on his home world . Despite temporary victories against members of both teams, Morrow was defeated thanks to the timely intervention of his creation Red Tornado, who joined the Justice Society. Years later, this amazing android would migrate to Earth-One, and join the Justice League.
Why T.O. Morrow, when using his temporal vision device to peer into the future, could only see the city on Earth-Two rather than his own Earth-One is unknown. It may be because, at that time, the sentinent Construct II** was disrupting Morrow's technology on Earth-One so it could horde these scientific secrets all for itself. In the process, Morrow discovered the Construct's Earth-Two counterpart in the sentient computer he later used to design Red Tornado*. Ironically, after that android was destroyed following his move to Earth-One, Construct III reconstituted the cyclonic cyborg's body to become a new version of Red Tornado. Thankfully, the original consciousness of Tornado asserted itself over Construct III and purged it from his mind.
* It seems the structural design of Red Panzer and Red Tornado were both borrowed from Streicher and Morrow’s time scanners they each built on Earth-Two and Earth-One.
** The Earth-Two doppelgängers of Earth-One’s Constructs I, II, III and IV were: Hourman’s Crime-Caster, Morrow’s Computer, Red Tornado, and the computer from the City of Tomorrow (while Morrow briefly brought over his computer to Earth-One, it was later absorbed onto Construct IV’s consciousness before Red Tornado destroyed it).




































