Cover: Jack Burnley

Superman #21

Mar 1943 · DC · 0.10 USD

📊 ~44,285 copies sold its debut month

☆ Be the first to review + Add to your collection — Join free

“The X-Alloy”

In "The X-Alloy," Superman takes on a dangerous case in 1943, racing to clear a falsely accused city commissioner by tracking down a key witness—criminal "Blinky" Moxby—after the murder of a corrupt street official. Written by Jerry Siegel and illustrated by Sam Citron, this gripping tale sees Superman push his limits, even letting Moxby believe he’s killed the Man of Steel to uncover the truth. The cover by Jack Burnley captures the tension of the moment, a 10-cent comic that stands as a sharp, early example of Superman’s moral complexity.

writer Jerry Siegel · artist, inker Sam Citron · cover Jack Burnley

Find on ebay

Search eBay for Superman #21 ▸

No confirmed live listings for this exact issue right now — this opens an eBay search.

Sell my copy

Have this issue — or a whole collection? Get a fair offer from us, skip the marketplace fees and the hassle.

We Buy Collections ▸

Fast, fair offers · we handle grading & shipping

Full credits

writer Jerry Siegel

artist, inker Sam Citron

cover pencils, inks Jack Burnley

Full plot ⚠ may contain spoilers

▸ Reveal full plot — may contain spoilers

The murder of Sam Jackson, a man involved in a street grafting operation, is blamed on a city commissioner, who informs Police that Mike Chandler did it, and his only witness to that event is another criminal, "Blinky" Moxby. Superman goes to great lengths to find Moxby and get proof of the commissioner's innocence, including allowing Moxby to think he has actually killed the Man of Steel!

Plot details indexed by the Grand Comics Database (CC BY-SA).