Al Plastino does the art on Action 313 (June 1964), as Superman’s nightmares come true.
The story begins as Supergirl casually reveals Superman’s identity to Perry White, as per the cover image. Superman is upset and mystified, even moreso when Batman then reveals that he is Clark Kent in front of Lois Lane.
Later, Lori Lemaris exposes Clark in front of Jimmy Olsen. It’s a really bad day!
Superman gathers his friends, and talks them into voluntarily undergoing a mind-wipe of his secrets. They participate, but it has no effect on them. In fact, it seems to make things worse, as they begin blackmailing him.
But this is all a huge scam by the Superman Revenge Squad, using a battery of androids. Lois, Jimmy, Perry, Batman, Supergirl and Lori had all been captured before the events in the story began, replaced by androids. Superman became suspicious when tear gas did not affect them. He finds his real friends, captive in a cave, and releases them, messing up another overly elaborate and somewhat aimless plot by the Revenge Squad.
Dorfman and Mooney put Lena Thorul through a lot in this tale. It opens as the FBI order her to write a criminology paper, as part of her application. Lex Luthor is one of those she must question.
Luthor has taken up raising flowers, and does his best to make a good impression on Lena, but her psychic powers reveal to her that they are siblings.
Lena is so shocked she flies to Africa and loses her memory, living as a jungle princess for a while.
She returns to the US, and takes on a job as a circus performer, but remains miserable. Supergirl works with Luthor, as he gives her a bouquet of flowers, whose scent induces amnesia. Lena loses her memory of being Luthor’s sister, and writes a nasty report on him, insisting his flower hobby be stopped. Oh, the irony.