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Action Comics #403 cover
Cover: Carmine Infantino & Murphy Anderson

Action Comics #403

Aug 1971 · DC · 0.25 USD
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In "Attack of the Micro-Murderer," Clark teams up with his professor to uncover the truth behind a seemingly ordinary janitor whose mysterious abilities hint at far greater powers than anyone suspected. Written by Geoff Browne and brought to life by Curt Swan’s expressive art and Murphy Anderson’s sharp inks, this 1971 classic blends science and suspense, with Carmine Infantino’s cover capturing the eerie intrigue of the story.

Contains 4 stories
Attack of the Micro-Murderer
15 pp · Superhero
Superman [Clark Kent]Lois LaneSupergirl [Linda Danvers]Zohtt

In "Attack of the Micro-Murderer," Stålmannen finds himself under siege by the alien Zohtt, a being capable of hijacking and controlling other bodies. With his own form now a battleground, he turns to Kandorian healers for help—but their methods fail to expel the intruder, leaving him trapped in a fight for his own mind.

The Man with the X-Ray Mind
7 pp · Superhero
Superman [Clark Kent]Mr. LundgrenProfessor Borwin

In "The Man with the X-Ray Mind," Clark teams up with his professor to uncover the truth behind a janitor whose mysterious abilities hint at scrying and precognition—abilities that quickly draw the dangerous interest of Professor Borwin, who plans to exploit them for a stolen secret formula.

The Impossible Legend
8 pp · Superhero
The VigilanteStuffOutlaw Benton (villain)Deputy BlakeDeputy CarterDeputy Wright

In "The Impossible Legend," a determined vigilante takes on a series of daring feats to prove an old myth true—capturing four criminals under impossible conditions: two while deaf, two while unable to speak, and the final pair when he could not see. The story unfolds with quiet intensity, testing the limits of perception and resolve in a world where even the most basic senses can be stripped away.

When Krypto Was Superboy's Master!
7.67 pp · Superhero
SuperboyKryptoLana LangProfessor Lang

ComicBooks.com Value

Our Model is In Beta
Raw (Fine) $9
CGC 9.8 · 4 in census $458*
CGC 9.6 · 8 in census $165
CGC 9.4 · 11 in census $78
CGC 9.2 · 2 in census $55*
CGC 9.0 · 3 in census $43
CGC 8.5 · 3 in census $37*
Show all 15 grades
CGC 8.0 · 1 in census $34*
CGC 7.5 · 1 in census $30*
CGC 7.0 · 2 in census $25
CGC 6.5 · 1 in census $23*
CGC 6.0 · 1 in census $22*
CGC 5.5 none in existence
CGC 5.0 · 1 in census $20*
CGC 4.5 none in existence
CGC 4.0 · 1 in census $20*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available

More listings for this title

GD $5.98 VG $6.99 FN $8 VG $8.4 VG $9.99 FN+ $9.99 VG+ $11.5 FN $11.99
Related listings we couldn't confirm as this exact issue · 47 total · seen 34 days ago

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Full credits

artist Curt Swan
letterer John Costanza
cover pencils Carmine Infantino
cover inks Murphy Anderson

Reprints

↩ Reprints Action Comics #176 (1953), Adventure Comics #310 (1963)

Reprinted in Superman Presents World's Finest Comic Monthly #80 (1971), MV Comix #4/1972 (1972), Supermann #12/1972 (1972), Stålmannen #1/1973 (1973), Batman Géant #4 (1973), Giant Superman Album #21 (1973), Supermann #10/1977 (1977), Serie-pocket #30 (1978), Superman Taschenbuch #36 (1981), DC Finest: Superman: Kryptonite Nevermore #[nn] (2025), Superman #61

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