Batman and Robin become performers in an alien zoo in the Sheldon Moldoff tale from Detective 326 (April 1964).
They get rounded up by aliens who do not distinguish them from the other Earth animals they are gathering.
Once in the zoo, they become star performers. Much of the entertainment value in this story is meant to be derived from watching Batman and Robin perform silly stunts for the amusement of goofy looking aliens.
Eventually they prove their intelligence, and are recognized as sentient beings, and sent back home.
The Martian Manhunter’s series comes to a close with this issue, which sees some huge changes to the series before it switches books.
The Idol Head of Diabolu is introduced, and emits its first monstrous effects, a destructive gas cloud, and it also makes a man emit energy beams from his eyes.
J’onn frantically tries to deal with both threats, both as the Manhunter, with Zook in tow, and as policeman John Jones, working with Diane Meade.
The police see the cloud descend on John Jones, who survives it, but uses the situation to fake the death of his human identity.
J’onn gets the eye beam man and cloud together, and they neutralize each other. But he joins Diane and Zook for the funeral of John Jones.
The series moves to become the cover feature of House of Mystery, bringing Zook and the Idol Head with it. Diane is left to mourn her former partner in ignorance of his actual survival.