Penciler credit verified by Sprang. Inker credit verified by Craig Delich.
Inker credit verified by Craig Delich; we previously suggested Howard Sherman or Gene McDonald.
Oddity: On page 2, panel 3, Batman titles this case "The Pigmy Plot" in his personal casebook on page 1, but "The Experiment of Professor Zero" on the last page.
Writer and letterer credits added by Craig Delich.