Superman is warned about a lizard-being from the 420th Century, the Quakerer, who has the power to change his own appearance or that of other beings or objects, and who has come back to the 20th Century to find a weapon that will destroy the humans of the future; The Quakerer is disguised as one of Clarks neighbors, but he does not know who.
While taking Jeans nephew to an amusement park, Ray Palmer has to become the Atom to trap two spies.