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Captain Marvel Adventures #18 cover
Cover: C. C. Beck
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Captain Marvel Adventures #18

Dec 1942 · Fawcett · 0.10 USD
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★ 1st appearance — Mary Batson★ 1st appearance — Mary Marvel
About this Issue

Captain Marvel Adventures #18 is the cornerstone of the Marvel Family franchise: it introduced Mary Marvel, Billy Batson's long-lost twin sister, making her one of the earliest female counterparts to a male superhero in the medium — and one of the very few Golden Age heroines to immediately headline her own solo strip. The issue simultaneously assembled all three core Marvels in a single story for the first time, establishing the family-team dynamic that would define Fawcett's publishing line for the rest of the decade. Mary Marvel would go on to anchor Wow Comics and earn her own 28-issue series, cementing her as the most prominent female superhero of the 1940s. Decades later the character was fully absorbed into DC continuity, and her origin as told here remains the template for every subsequent retelling in comics, animation, and film.

In "Captain Marvel Introduces Mary Marvel," Billy Batson stumbles upon a surprising connection when a girl from a radio quiz show reveals she owns half of a mysterious locket—one that matches the one he’s kept all along. With help from her former nurse, Billy begins to piece together a truth that redefines his past: he and Mary are twins, separated long ago. Written by Otto Binder and illustrated by Marc Swayze, this pivotal story unfolds with quiet emotional weight, grounded in the wartime charm of 1942. The cover by C. C. Beck captures the moment with a striking, nostalgic flair.

Contains 7 stories
Captain Marvel Introduces Mary Marvel
12.33 pp · Superhero
Captain Marvel [Billy Batson]Mary Marvel [Mary Batson, aka Mary Bromfield] (Billy Batson's twin sister, introduction, origin)Billy BatsonSterling MorrisPercy PillSarah Primm (Billy and Mary's nurse, death)Captain Marvel, Jr. [Freddy Freeman]The Wizard Shazam
Captain Marvel Fights a Nightmare
13 pp · Superhero
Captain Marvel [Billy Batson]SteamboatSterling MorrisBilly BatsonProfessor Archimedes Bram
The What-Not Adventure
10 pp · Superhero
Captain Marvel [Billy Batson]Billy BatsonSterling MorrisMrs. ThorntreeBrutus Duval (crook)

Young broadcaster Billy Batson is sent to cover the First Annual Meeting of the Society for the Collection of Obtuse What-Nots, only to find himself the sole man among an intimidating group of women—led by the formidable Mrs. Thorntree—and quickly in over his head when crooks led by Brutus Duval learn of the society's substantial treasury. As chaos erupts and Billy must juggle between his civilian identity and his superhero alter ego Captain Marvel, he'll need all his wits to protect both the what-nots and the society's hard-earned funds.

Untitled Non-Fiction story
1 pp · Non-Fiction
Tanks A Lot
6 pp · Humor
Captain Kid
Untitled Non-Fiction story
1 pp · Non-Fiction
The 3 Wishes of Tim Tucker
12 pp · Superhero
Captain Marvel [Billy Batson]The Wizard ShazamBilly BatsonSteamboatTim TuckerProfessor Murder (villain, introduction)

When Tim Tucker fishes up an old bottle and breaks it, he releases a genie who grants him three wishes—but wishes granted to a mortal boy with more ambition than wisdom can turn golden pretty quickly. Tim's first wish gives him King Midas's touch, and when his second wish makes him the most important man in the country, he learns that power and responsibility aren't quite the same thing. Captain Marvel watches from the sidelines, knowing that Tim's third and final wish may be the only thing that saves him from his own success.

ComicBooks.com Value

Our Model is In Beta
Raw (Good) $792
CGC 9.0 · 3 in census $19,781
CGC 8.5 · 6 in census $12,638*
CGC 8.0 · 3 in census $6,409
CGC 7.5 · 8 in census $5,892
CGC 7.0 · 11 in census $3,752
CGC 6.5 · 9 in census $3,752
Show all 18 grades
CGC 6.0 · 10 in census $2,602
CGC 5.5 · 10 in census $2,602
CGC 5.0 · 20 in census $2,491
CGC 4.5 · 10 in census $2,026
CGC 4.0 · 14 in census $1,870*
CGC 3.5 · 16 in census $1,870
CGC 3.0 · 11 in census $1,115*
CGC 2.5 · 10 in census $1,115
CGC 2.0 · 6 in census $1,115
CGC 1.5 · 4 in census $904*
CGC 1.0 · 2 in census $764
CGC 0.5 · 24 in census $736
* 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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CGC 6.5 $9,350 1 listing CGC 6 $1,770 1 listing CGC 5.5 $2,980 1 listing
CGC 5 $660–$1,100 2 listings
CGC 4 $7,141 1 listing Raw — VF/NM $3.89 1 listing Raw — POOR $324 1 listing
Raw / ungraded $300–$20,000 2 listings
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Fawcett - CAPTAIN MARVEL ADVENTURES (1941-53) #18 - Grade 4.5 - Comic Book $2750
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History

The story 'Captain Marvel Introduces Mary Marvel' was written by Otto Binder — who had taken over as the series' primary writer in 1942 after original scripter Bill Parker was drafted — and drawn entirely by Marc Swayze, a Fawcett staff artist whose prior credits included the aviation hero Phantom Eagle. Swayze modeled Mary's appearance and personality on actress Judy Garland, a choice endorsed by editor Rod Reed, who also intervened in the character's power set: Reed suggested substituting the moon goddess Selene for the Greek poet Sappho as one of Mary's divine patrons, ensuring the new heroine's backstory would suit a young readership. The issue's painted cover, featuring Captain Marvel Jr., has been attributed to both C.C. Beck and Swayze in different sources; the Grand Comics Database and Alter Ego #147 (2017) credit the interior origin story's art solely to Swayze.

Trivia · 8 facts

  • First appearance and origin of Mary Marvel (Mary Batson / Mary Bromfield), Billy Batson's twin sister, who gains her powers by saying 'Shazam' — written by Otto Binder, drawn by Marc Swayze (Captain Marvel Adventures #18, cover-dated December 1942, on sale November 13, 1942).
  • First issue to unite the core Marvel Family — Captain Marvel, Mary Marvel, and Captain Marvel Jr. — in a single story.
  • Bulletgirl (Susan Kent) and Captain Marvel Jr. appear on the 'Comix Cards' feature printed on the back cover, representing Bulletgirl's in-universe crossover presence within the Captain Marvel Adventures title.
  • Mary Marvel's design was based by artist Marc Swayze on actress Judy Garland; editor Rod Reed shaped the character's power-set by suggesting Selene replace Sappho as one of her mythological patrons.
  • Otto Binder named the character after his own daughter Mary; he would go on to write over 900 of the approximately 1,790 Captain Marvel-related stories Fawcett published.
  • The origin story 'Captain Marvel Introduces Mary Marvel' was later reprinted in Shazam! #8, Shazam from the Forties to the Seventies #1, Shazam! and the Shazam Family Annual #1, The Shazam! Family Archives vol. 1 (DC, 2006), and Shazam!: A Celebration of 75 Years (DC, 2015).
  • A facsimile edition of the issue was published by PS Artbooks (2023), making the full contents widely accessible to modern readers for the first time in decades.
  • Susan Kent (Bulletgirl) had debuted as a civilian character in Nickel Comics #1 (May 1940) and became Bulletgirl in Master Comics #13 (April 1941); Bulletman and Bulletgirl were Fawcett's second most popular characters after the Marvel Family.

Cast · 2 characters

Full credits

artist, inker Marc Swayze
cover pencils, inks C. C. Beck

Reprints

Reprinted in Shazam! #8 (1973), Shazam! #5/1974 (1974), Shazam from the Forties to the Seventies #[nn] (1977), Shazam! and the Shazam Family! Annual #1 (2002), The Shazam! Family Archives #1 (2006), Shazam!: A Celebration of 75 Years #[nn] (2015), Captain Marvel [Captain Marvel Adventures] #13

Key issues in Captain Marvel Adventures

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