Superboy in "Origin of the Superman-Batman Team"
Superboy uses his time-telescope to see himself as Superman working with Batman to catch a crook. Later, Bruce Wayne moves to Smallville and Lana convinces him to assume the identity of the Flying Fox and become a partner to Superboy. Lana challenges Bruce to find out Superboy's true identity, which he does. However, instead of telling Lana, he tells Clark he knows his secret, but feeling he is too young to be trusted to keep the secret, asks Superboy to hypnotically remove the knowledge from his mind. Soon after, Bruce and his foster parents leave Smallville.
Congorilla in "Champion of the World"
An untitled Little Pete strip.
Aquaman in "The Interplanetary Mission!"
Crooks disguise themselves as aliens to try and convince Aquaman and Aqualad to retrieve a kryptonite meteor for them from the ocean floor.