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Detective Comics #217 cover
Cover: Win Mortimer

Detective Comics #217

Mar 1955 · DC · 0.10 USD
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In "The Mental Giant of Gotham City!", young Barney Barrows—driven by a dream to become a policeman—finds his path blocked by a failed mental test. But after a lab explosion grants him an enormous intellect and a swollen head, Barney turns his newfound mind against Gotham’s guardians, forcing Batman and Robin to obey his commands. Written by Edmond Hamilton and brought to life with sharp, expressive art by Dick Sprang and Charles Paris, this 1955 classic features a cover by Win Mortimer that captures the story’s eerie, larger-than-life tension.

Contains 5 stories
The Mental Giant of Gotham City!
10 pp · Superhero
Batman [Bruce Wayne]Robin [Dick Grayson]Mental Giant [Barney Barrows] (villain, reforms)The Mental's Mob [Kylerrest unnamed] (villains)

In "The Mental Giant of Gotham City!" from Detective Comics #217, young Barney Barrows—once rejected for being too mentally unqualified to join the force—finds his mind amplified after a lab explosion, growing both in size and intellect. Now wielding a towering intellect, he turns his obsession with policing into a dangerous game, forcing Batman and Robin to serve his warped sense of justice.

Untitled Humor story
2 pp · Humor
Casey
The World's Sea Fair!
6 pp · Detective-Mystery
Captain Compass [Mark Compass]
Untitled Humor story
0.5 pp · Humor
Little Pete
The Unlucky Guest Stars!
6 pp · Detective-Mystery
Roy Raymond

ComicBooks.com Value

Our Model is In Beta
Raw (Good) $109
CGC 9.2 · 1 in census $2,457*
CGC 9.0 none in existence
CGC 8.5 none in existence
CGC 8.0 · 3 in census $1,224
CGC 7.5 · 6 in census $749
CGC 7.0 · 2 in census $583
Show all 17 grades
CGC 6.5 none in existence
CGC 6.0 · 4 in census $400
CGC 5.5 · 2 in census $380*
CGC 5.0 · 7 in census $300
CGC 4.5 · 1 in census $300*
CGC 4.0 · 1 in census $233
CGC 3.5 · 1 in census $233*
CGC 3.0 · 2 in census $211*
CGC 2.5 · 2 in census $171*
CGC 2.0 · 1 in census $146*
CGC 1.5 · 1 in census $112*
* estimate — limited direct-sales data at this grade
Our model’s value — refined as new sales data arrives · CGC census counts shown where available

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Full credits

cover pencils, inks Win Mortimer

Reprints

↩ Reprints World's Finest Comics #42 (1949)

Reprinted in The Hundred Comic Monthly #8 (1957), Century, The 100 Page Comic Monthly #14 (1957), Batman Annual #3 (1962), DC Comics Classics Library: The Batman Annuals #1 (2009)

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