Origin and first appearance Lori the Mermaid.
Art altered to include Brainiac's skull terminals. First Appearance Brainiac and Kandor.
Originally part 1 of a 3-part novel, this chapter was originally titled "The Girl of Steel" and was slightly edited to be read independently for Superman Annual (DC, 1960 series) #6. It is that version reprinted here.
Super-Girl differently colored in this reprint to distinguish her from Supergirl (Kara Zor-El), who had not yet been created when this story first appeared.
This Super-Girl was a try out to gauge reader reaction to the character.
Origin and first appearance Metallo.