Issue 1
Showcase (1956-) #4
The first appearance and origin of the Silver Age Flash, Barry Allen, and his wife, Iris West! This issue officially begins the Silver Age of comics with Barry Allen serving as the first DC Silver Age superhero!
Issue 2
Showcase (1956-) #8
The second appearance of The Flash! With the first-ever appearance, and origin, of Captain Cold, The Flash's arch-nemesis.
Issue 3
Showcase (1956-) #13
"AROUND THE WORLD IN 80 MINUTES." Paris! The Sahara desert! Tibet – and the Pacific Ocean! The Flash, Fastest Man Alive, rockets to those distant places and more in the most astonishing adventure of all time! Plus, "MASTER OF THE ELEMENTS."
Issue 4
Showcase (1956-) #14
"GIANTS OF THE TIME WORLD." The Flash rockets into the fourth dimension to battle reality-invading aliens! Plus, "THE MAN WHO CHANGED THE EARTH."
Issue 5
Showcase (1956-) #15
"THE GREAT PLUTONIUM PLOT." A renegade scientist is stealing all the plutonium in the galaxy. He hopes to rule the solar system with his "Teleportator," but needs the radioactive element to power it. Unfortunately for him, he must go through Space Ranger to get it. Plus, "THE ROBOT PLANET."
Issue 6
Showcase (1956-) #16
"THE SECRET OF THE SPACE MONSTER." President Thaddeus Starr is warned of a space-monster sighting near Ganymede, a moon of Jupiter. Space Ranger thinks things don't quite add up and decides to investigate. Plus, "THE RIDDLE OF THE LOST RACE."
Issue 7
Showcase (1956-1978) #17
Zapped by the Zeta-Beam, Adam Strange is teleported, not to Rann, but to Anthorann, a neighboring planet; escaping barbarians and their "Rainbow Doom" (a teleporter), he meets Alanna and Sardath, who had used knowledge from Samakand scientists to journey to Anthorann.
Issue 8
Showcase (1956-1978) #18
Adam Strange is Zeta-beamed to Rann, but pop-eyed green aliens inhabit the city! Adam is thrown into an "Orkinomikron" to wake on a desolate atomic world, having been shrunk to the size of an atom!
Issue 9
Showcase (1956-1978) #19
In Calcutta, India, Adam Strange, along with a number of explorers, are on hand to witness an ancient rope trick. When one of the locals explains that it's a trick, and nobody can disappear at the end of the rope, Adam Strange offers to prove him wrong!
Issue 10
Showcase (1956-) #20
"PRISONERS OF 100 MILLION B.C." Featuring the origin and first appearance of Rip Hunter! Having finished work on Time Sphere II, Rip Hunter and Jeff Smith take a trip back to the Mesozoic era!
Issue 11
Showcase (1956-) #21
"SECRET OF THE LOST CONTINENT." Rip Hunter discovers an ancient tablet with the location of the lost continent of Atlantis! The only problem is the last line is illegible, and Rip decides to travel to 331 B.C. to find out what it was!
Issue 12
Showcase (1956-1978) #22
The very first appearance of one of DC's greatest heroes, Hal Jordan! Test pilot Hal Jordan traces a downed aircraft to the Southwest desert, where he finds the dying alien being, Abin Sur, one of the Green Lantern Corps, whose ring chooses Hal to be Earth's new Green Lantern! Plus, "THE SECRET OF THE FLAMING SPEAR!" and "THE MENACE OF THE RUNAWAY MISSLE!"
Issue 13
Showcase (1956-) #23
"SUMMONS FROM SPACE!" Hal Jordan is summoned by the Guardians of the Universe to face a deadly and primitive threat on the planet Venus! Plus, "THE INVISIBLE DESTROYER!"
Issue 14
Showcase (1956-) #24
"THE CREATURE THAT COULDN'T DIE!" Hal Jordan faces a creature whose eyes emit beams of yellow energy, the only problem is Hal's Green Lantern ring is useless against the color yellow! Plus, "THE SECRET OF THE BLACK MUSEUM!"
Issue 15
Showcase (1956-) #25
"CAPTIVES OF THE MEDIEVAL SORCERER!" As a favor to his friend Professor Blakeslee, Rip Hunter agrees to take Doctor Senn into the distant past. The destination is the island kingdom of Ritannia in the year 960!
Issue 16
Showcase (1956-) #26
"THE ALIENS FROM 2,000 [HB1] B.C." An Egyptology professor asks for Rip Hunter's help in solving mysterious hieroglyphs showing the ancient Egyptians worshipping unknown gods. With his fellow time masters tagging along, Rip takes the Time Sphere into the year 2000 B.C. to find some answers!
Issue 17
Showcase (1956-) #27
"THE GOLDEN MONSTER." A group of scuba divers meet each other during a dive in the Pacific to find a sunken treasure. Unfortunately for them, they find a huge sea monster waiting to devour them!
Issue 18
Showcase (1956-) #28
"THE PRIZE FLIPPERS." The Sea Devils compete to win the flippers that belong to Dane's father. Everyone knows how badly Nicky wants them, so they each disparage their own efforts in the competition.
Issue 19
Showcase (1956-) #29
"LAST DIVE OF THE SEA DEVILS." After hearing radio reports of a UFO sighting, the Sea Devils, out in the boat Sea Witch, encounter the giant "King Neptune" who is spearing boats from a giant seahorse! Plus, "UNDERSEA SCAVENGER HUNT."
Issue 20
Showcase (1956-) #30
"THE CREATURES FROM ATLANTIS." After answering a distress call out at sea, Aquaman is captured and held prisoner by amphibious aliens!
Issue 21
Showcase (1956-) #31
"THE SEA BEASTS FROM ONE BILLION B.C." John Cook steals Professor Richards' experimental ray gun, which will turn any normal fish into a large sea monster! Now it's up to Aquaman and Aqualad to find a way to get these creatures back to normal size!
Issue 22
Showcase (1956-) #32
"THE CREATURE KING OF THE SEA!" Aquaman and Aqualad are on the hunt for treasure! Wilo the Wizard has hidden a treasure chest, and Aquaman and Aqualad lend a hand to a diver who is searching for it!
Issue 23
Showcase (1956-) #59
The Teen Titans—Robin, Kid Flash, Wonder Girl and Aqualad—battle a trio of rock 'n' roll robbers in this classic tale!
Issue 24
Showcase (1956-1978) #75
A mysterious disembodied entity known only as the Voice bestows great physical power upon two teenage brothers, Hank and Donald Hall, who go on to become the heroes Hawk and Dove!
Issue 26
Showcase (1956-) #98
Power Girl is attacked by the Symbio-ship, the spacecraft that carried her to Earth.
Issue 27
Showcase (1956-) #99
As Power Girl adopts the secret identity of Karen Starr to better fit in on Earth, Brainwave uses a computer to transport Keystone City into a limbo dimension.