from another universe taking the form of four Black Spheres land and merge
with individuals from Earth-Two transforming them into super human beings
with an evil nature. The JSA, including new member, the adult Robin
of Earth-Two set out to tackle these new "super villains". Suffering
a resounding defeat, Johnny Thunder sends his Thunderbolt to collect the
JLA from Earth-One to assist the JSA, however they too have been battling
a similar menace, without success. Four heroes from the combined
groups subject themselves to the Sphere's influence allowing their colleagues
to combat them and try to isolate some weakness that can then use on the
other victims. Johnny Thunder's T-bolt then uses this weakness to
blast the four villains and separated the Spheres from their bodies, returning
them to normal and also destroying the Spheres.
Superman, Green Arrow, The Flash & Green Lantern.
Hourman, Wildcat, Wonder Woman, The Hawkman, Mr Terrific, Johnny Thunder & his Thunderbolt and the first silver age appearance of The Robin of Earth-Two as an adult member of the JSA.
The Black Spheres
linked with How Chu, Gem Girl, Money Master & The Smashing Sportsman