There is an awful lot of deception going on in Adventure 290 (Nov 61). Tom Tanner, who happens to look identical to Clark Kent, escapes from a reform school and just happens to wind up in Smallville, where everyone, including Ma and Pa Kent, assume he is Clark.
So he steps into Clark’s life while Superboy meets Sun Boy just outside of town.
Sun Boy had appeared as a Legion applicant in a recent appearance of the team, in which Supergirl was recruited (Action 276), and is revealed to be a member now. His origin is told in brief, gaining his powers though an accident in his father’s lab. At this point Sun Boy’s powers are limited to emitting light.
He sends Sueprboy off to gather sealed containers, the contents of which will build a weapon, and Superboy goes. But this is not the real Sun Boy, simply an imposter. So we have two phonies in this story!
Of the two, Tom is having the more impressive time, passing one of Lana’s tests to prove Clark is Superboy, and also making Clark look much tougher at school.
Sun Boy builds his silly looking killer robot, but fails in his plans, because Superboy knew all along he was a fake. Why? Because he did not use the secret Legion handshake. There never had been a secret Legion handshake before this story, and never would be again.
There’s some stuff with Tom that is too complex and contrived to bother explaining, but he becomes a good person and goes off to live his life, and is never heard from again. Nor is the Sun Boy imposter. Of all the Legion stories that pre-date their series, I think this is the one I like least.
The Bizarro World story is probably the most serious tale of the run, if only because they risk the destruction of their world.
Creatures made of blue kryptonite (which is deadly to Bizarros) emerge from underground and begin attacking. The Bizarros respond by cheering them on.
Jerry Siegel includes a detail that no other Bizarro story will acknowledge, that only Bizarros based on Superman are vulnerable to blue kryptonite. So a squad of Bizarro Loises are sent out to fight.
In the end its Bizarro Jimmy Olsen who saves the day, creating Bizarro versions of Superman’s lead suit, which protects them and allows them to defeat the creatures.