"There Shall Come a Gathering"
Some unknown force is disrupting the very fabric of time and pulling the Earth out of orbit.
And heroes from all times pop-up everywhere and they band together to battle the aliens responsible and save the Earth.
The Atom, The Flash and Rip Hunter battle gold robots aboard an orbiting spaceship.
Lois Lane, The Creeper and the Challenger of the Unknown fly to the Rocky Mountains to crack a big green alien box.
The Metal Men and the Teen Titans battle Nazis and Vikings.
Adam Strange and the Space Ranger gather the magic heroes Phantom Stranger and the Spectre to help channel energy to return the Earth to its proper orbit. Lois Lane and Angel O'Day enter the big green box and pull wires and everything returns to normal.
This story features almost every character who ever appeared in Showcase.