Action Comics 339, Jul 1966 comics.org

Shooter's Credit: writer
Story Title: Braniac's Blitz
Publisher: DC
Reading Status: required

Script: Jim Shooter
Pencils: Jim Mooney
Inks: Jim Mooney
Colors: unknown
Letters: unknown

Synopsis: Supergirl defends Metropolis from Brainiac while Superman is away on a space mission with the Justice League.

Characters: Superman, Supergirl, Brainiac, Professor Carter

Places: Metropolis, Stanhope College

Things: Green Kryptonite

Cliffhanger: Supergirl is trapped in a green kryptonite cage and Brainiac blasts her with a lethal force-shield ray.

Conclusion: The cage was made for Superman, so Supergirl was able to squeeze through the bars before the force-shield ray hit. Brainiac escapes by shooting himself with a time-travel gun.

Notes: Shooter's writing credit obtained from reprint in Superman Family 164.