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| 1 |
01 March 1956
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DC Showcase #1
The School For Smoke-Eaters / Fire Under The Big Top / Fourth Alarm
Key: First issue
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| 2 |
01 May 1956
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DC Showcase #2
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| 3 |
01 August 1956
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DC Showcase #3
The Frogmen!
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| 4 |
01 October 1956
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DC Showcase #4
Mystery of the Human Thunderbolt / The Man Who Broke the Time Barrier
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| 5 |
01 December 1956
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DC Showcase #5
The Greatest Villain of All Time / The Two Faces of Mr. X / The Human Eel
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| 6 |
01 February 1957
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DC Showcase #6
The Secret of the Sorcerer’s Box!
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| 7 |
01 April 1957
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DC Showcase #7
ULTIVAC is Loose!
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| 8 |
01 June 1957
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DC Showcase #8
The Secret of the Empty Box! / The Coldest Man on Earth!
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| 9 |
01 August 1957
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DC Showcase #9
The Girl in Superman’s Past! / The New Lois Lane / Mrs. Superman
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| 10 |
01 October 1957
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DC Showcase #10
The Jilting of Superman / The Sightless Lois Lane / The Forbidden Box from Krypton
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| 11 |
01 December 1957
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DC Showcase #11
The Day the Earth Blew Up!
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| 12 |
01 February 1958
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DC Showcase #12
The Menace of the Ancient Vials!
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| 13 |
01 April 1958
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DC Showcase #13
Around the World in 80 Minutes!; Master of The Elements
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| 14 |
01 June 1958
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DC Showcase #14
Giants of the Time-World!; The Man Who Changed the Earth
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| 15 |
01 August 1958
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DC Showcase #15
The Great Plutonium Plot; The Robot Planet
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| 16 |
01 October 1958
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DC Showcase #16
The Secret of the Space Monster; The Riddle of the Lost Race
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| 17 |
01 December 1958
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DC Showcase #17
Secret of the Eternal City; The Planet and the Pendulum
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| 18 |
01 February 1959
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DC Showcase #18
Invaders From the Atom Universe!; The Dozen Dooms of Adam Strange!
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| 19 |
01 April 1959
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DC Showcase #19
Challenge of the Star-Hunter!; Mystery of the Mental Menace!
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| 20 |
01 June 1959
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DC Showcase #20
Prisoners of 100 Million B.C.
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| 21 |
01 August 1959
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DC Showcase #21
The Secret of the Lost Continent
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| 22 |
01 October 1959
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DC Showcase #22
S.O.S. Green Lantern / Secret of the Flaming Sphere / Menace of the Runaway Missile!
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| 23 |
01 December 1959
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DC Showcase #23
Summons from Space! / The Invisible Destroyer!
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| 24 |
01 February 1960
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DC Showcase #24
The Secret of the Black Museum / The Creature That Couldn’t Die!
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| 25 |
01 April 1960
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DC Showcase #25
Captives of the Medieval Sorcerer
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