Appearing in "Earth X, Chapter 1"
Featured Characters:
- Captain America (Steve Rogers) (Main story and flashback) (Origin revealed) (Joins U.S. Army, Project Rebirth, and Avengers in flashback)
- Inhuman Royal Family
- Luna Maximoff (First appearance)
- Medusa (Medusalith Amaquelin)
- Black Bolt (Blackagar Boltagon)
- Gorgon
- Karnak
- Triton
Supporting Characters:
- Allies (Only in flashback)
- U.S. Army (Only in flashback)
- Bucky (James Barnes) (Only in flashback)
- U.S. Army (Only in flashback)
- Project Rebirth (First appearance) (Only in flashback)
- Dr. Abraham Erskine (First appearance) (Only in flashback)
- Avengers (Only in flashback)
- Iron Man (Tony Stark) (Appears in flashback and onscreen in main story; as Iron Man in flashback only)
- Wasp (Janet Van Dyne) (Only in flashback)
- Thor (Appears in flashback and cameo in main story)
- Giant-Man (Hank Pym) (Only in flashback)
- Redwing (First appearance) (Only in flashback)
- Redwing (Wyatt Wingfoot) (First appearance)
- Scott Summers
- Iron Avengers (First appearance)
- Monolith ("Hank") (First appearance)
- Crimson Sage ("Wanda") (First appearance)
- Bolt ("Pietro") (First appearance)
- Steelbow ("Clint") (First appearance)
- Vision (First appearance)
- Sting ("Jan") (First appearance)
Antagonists:
- Axis (Only in flashback)
- Nazi Germany (Only in flashback)
- Adolf Hitler (Only in flashback)
- Red Skull (Johann Shmidt) (Only in flashback)
- Nazi Germany (Only in flashback)
- The Hydra (First appearance)
- Falcon / Hydra (Sam Wilson) (First appearance) (As Falcon in flashback only)
- Hydra (Jen Walters) (First appearance)
- Hydra (Jessica Drew) (First appearance)
- Hydra (Sharon Carter) (First appearance)
- Hydra (Eugene Judd) (First appearance)
- Hydra (Fred Dukes) (First appearance)
- Hydra (Val de Fontaine) (First appearance)
- Hydra (Dum Dum Dugan)
Other Characters:
- Uatu (Voice only)
- Inuit (Only in flashback)
- Sub-Mariner (Namor McKenzie) (Only in flashback)
- The Watcher (Aaron Stack)
- Ahura Boltagon (Mentioned)
- Lockjaw (Earth-9997) (First appearance)
- Daredevil (Poster) (First appearance)
- Professor X (Charles Xavier) (Mentioned) (Deceased)
- Peter Parker
- NYPD (First appearance)
- Sgt. Luke Cage (First appearance)
- Venom (May Parker) (First appearance)
- President Norman Osborn (Mentioned)
- Punisher (Frank Castle) (Mentioned)
- Abel Stack (Mentioned) (Deceased)
- Osborn Industries (Mentioned)
- Nick Fury (Mentioned)
- Nick Fury LMDs (Mentioned)
- Human Torch (Jim Hammond) (Mentioned) (Deceased)
- Original Hydra (Mentioned)
- Black Panther (T'Challa) (Mentioned)
Races and Species:
- Watchers (Voice only)
- Humans (Main story and flashback)
- Atlantean-Human Hybrids (Only in flashback)
- Asgardians (Only in flashback)
- Robots
- Inhumans
- Inhuman Dogs (Corpse, skeleton or other remains)
- Hydra (First appearance)
- Mutants
- Symbiotes (First appearance)
- Synthezoids
- Life-Model Decoys (Mentioned)
Locations:
- Earth-9997
- Earth (Main story and flashback)
- North America (Main story and flashback)
- United States of America (Main story and flashback)
- Virginia (First appearance)
- Arlington County (First appearance) (Only in flashback)
- Camp Lehigh (First appearance) (Only in flashback)
- Arlington County (First appearance) (Only in flashback)
- New York
- Washington, D.C. (Mentioned)
- House of Congress, National Mall (Mentioned)
- White House (Mentioned)
- Virginia (First appearance)
- United States of America (Main story and flashback)
- Europe (Only in flashback)
- Atlantic Ocean (Only in flashback)
- North Sea (Only in flashback)
- Earth Orbit
- Asia
- Wakanda, Africa (Mentioned)
- North America (Main story and flashback)
- Earth (Main story and flashback)
Items:
- Super-Soldier Serum (First appearance) (Only in flashback)
- Captain America's Shield (Main story and flashback)
- Iron Man Armor Model 2 (Only in flashback)
- Cosmic Cube (First appearance) (Only in flashback)
- Falcon's Wings (First appearance) (Only in flashback)
- Ruby-Quartz Sunglasses (First appearance)
- Venom Symbiote (First appearance)
Events:
- World War II (Only in flashback)
Synopsis for "Earth X, Chapter 1"
- The cover to this issue features Redwing, Captain America, as well a new Daredevil and a Hydra creature which both made their debut in this issue.
- Page 2-3: In the center of the page is a depiction of young Steve Rogers taking the super soldier serum that turned him into Captain America originally presented in Captain America Comics #1. The fourth panel shows the Red Skull, first seen in Captain America Comics 7 as Captain America's arch nemesis. Panels five through seven showcase Captain America and his relationship with Bucky (Bucky Barnes, first seen in Captain America Comics #1 who was Captain America's sidekick during World War 2.
- Page 4-5: Panel one shows Bucky's death aboard an exploding drone plane, first shown in Avengers 4. Panel two shows the Sub-Mariner coming across the frozen body of Captain America, this also was from Avengers #4. The center panel shows Captain America as he appeared in the Silver Age starting in Avengers #4, the head shots are of the members of the Avengers of the time (circa Avengers #4): Iron Man (Tony Stark), the Wasp, Giant Man (Henry Pym) and Thor. Panel four depicts the Red Skull attacking Captain America and the Falcon from Captain America 117 with the Cosmic Cube (created by AIM -- Advanced Idea Mechanics -- in Strange Tales 79) originally happened in Captain America and the Falcon #???. Panel five shows a Captain America for President sign, Cap originally ran for president in Captain America 250.
- Page 6: Panel 3 shows the Inhumans: Medusa, Black Bolt, Karnak and Triton.
- Page 7: Panel one, Gorgon is first seen. This page shows that they are on Attilan, first seen in Fantastic Four 47. It is located in the Himalayan mountains.
- Page 8: Panel 1 we see Luna (First seen Fantastic Four 240) who is the son of the Inhuman Crystal, and the mutant Quicksilver (Pietro Maximoff) Panel 5, Medusa is holding the tuning fork that once adorned the head of Inhuman royal pet, Lockjaw (first seen Fantastic Four 45).
- Page 9: The Daredevil mentioned on the posters in the third panel should not be confused with the original Daredevil (Matt Murdock) who first appeared in Daredevil 1. The Daredevil depicted here is a new character created for the Earth X series.
- Page 10-11: Not your father's Hydra, the creatures known as Hydra are associated with the terrorist organization of the same name the same name first seen in Strange Tales 135. Their only similarity is of these creatures forms and the logo of the Hydra organization are like the mythical Hydra creature. There is no connection between either entities.
- Page 12: The creature that Redwing addresses in panel four is She-Hulk, who first appeared in Savage She-Hulk #1. The two once had a relationship which started when she was a member of back in the Fantastic Four circa Fantastic Four #269.
- Page 13 panel 2: The "Sam" that Cap is speaking to is Sam Wilson, AKA the Falcon who first appeared in Captain America 117 and was his partner for a time.
- Page 14 panel 3: The man in the red glasses is Scott Summers, formerly Cyclops of the X-Men. He first appeared in Uncanny X-Men 1.
- Page 15 panel 6: The "Charles" whom Scott speaks of is Charles Xavier, who as Professor X was the founder of the X-Men and Scott's former teacher and mentor.
- Page 16: Panel one we see for the first time Peter Parker (aka Spider-Man in Amazing Fantasy 15.) Sgt Cage in panel 5 is none other than Luke Cage (Carl Lucas, first appearance Luke Cage, Hero for Hire 1) who was once a costumed hero before becoming a police officer. Panel 7 we see Venom (May Parker) who has various other counterparts in other realities.
- Page 19 Panel 3: the "Tony" that Redwing speaks of is Tony Stark, formerly Iron Man.
- Page 20-21: Panel one shows the first appearance of the Iron Avengers, (Hank, Clint, Vision, Wanda, Pietro and Jan). With the exception of the Vision, all members are robots fashioned in the homage to the original Avengers they're named after. Panel five "President Osborn" refers to Norman Osborn (first seen Amazing Spider-Man 14) formerly the Green Goblin.
- Page 23 Panel 5: The Red Skull design on the scrap of cloth resembles that worn by the Punisher (Frank Castle) who had a white skull on his uniform. The ending quote is from "The Rime of The Ancient Mariner", by Samuel Taylor Coleridge a poem originally published in 1798. The poem is about the supernatural events experienced by a mariner on a long sea voyage. The Mariner stops a man who is on the way to a wedding ceremony, and begins to recite his story. The Wedding-Guest's reaction turns from bemusement and impatience to fascination as the Mariner's story progresses.
- The Appendix to the first issue makes mention a number of Captain America related characters the following characters were inquired upon in this issue: President Osborn, who is Norman Osborn, foe of Spider-Man he was known as the Green Goblin, he first appeared in Amazing Spider-Man #14; Nick Fury, was director of S.H.I.E.L.D. and long time Captain America ally, he first appeared in Sgt. Fury and His Howling Commandos #1. LDM's, or Life Model Decoys are robot replicas of humans, they were used commonly by S.H.I.E.L.D. first used in ???; The original Human Torch, Cap's wartime ally first appeared in Marvel Comics #1; Sharon Carter was an agent of S.H.I.E.L.D. and one time flame of Cap, she first appeared in Tales of Suspense #75. Black Panther, aka T'Challa first appeared in Fantastic Four #52, and has been an ally of Cap since he joined the Avengers in Avengers #52. The Cosmic Cube mentioned here first appeared in Tales of Suspense #79; The Red Skull is Cap's long time foe Johann Schmidt who first appeared in Captain America Comics #7; The Falcon mentioned here is Sam Wilson, frequent Cap sidekick first seen in Captain America #117.