The Disney+ series Secret Invasion, which stars Samuel L. Jackson as Nick Fury, details the veteran agent’s attempt to uncover a conspiracy of alien Skrull infiltrators on Earth. The show’s title refers to a seismic event in the Marvel universe, which took place in the eight-part Secret Invasion event mini-series in 2008. For MCU fans who are less familiar with the comics, here’s a full breakdown of the Marvel Comics Secret Invasion event. Just what was the secret invasion? Who exactly were the aliens that did all the invading? And how did it all work out in the end? Here’s the comic book history of the Secret Invasion and how it differs from what we’re seeing in the MCU.

Key art from the 2008 comic book event series Secret Invasion.
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What Is Marvel Comics’ Secret Invasion?

Secret Invasion was the brainchild of Marvel Comics writer Brian Michael Bendis. After revitalizing Earth’s Mightiest Heroes with his New Avengers run starting in 2005, Bendis planted the seeds for what would be one of his greatest epics. He began his long run at the end of the original Avengers series, with the storyline Avengers Disassembled. This story saw the legendary team crumble from within. It was the end of an era that had lasted over 400 issues.

But soon, Captain America and Iron Man would put together a new Avengers team, realizing the world couldn’t go unprotected. For the first time, long-standing Marvel heroes like Spider-Man and Wolverine would join the ranks. Also enlisted was one hero who hadn’t been heard from in a long time: Jessica Drew, the original Spider-Woman. Fans hadn’t seen her in costume in decades but were nevertheless excited for her return. However, this return was not as it seemed. Before we get too far into Marvel Comics’ Secret Invasion, a brief explainer on a particular alien race is in order.

A Brief History of Marvel Comics’ Skrulls, Key Secret Invasion Players
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The menacing Skrulls have been a thorn in the side of Marvel’s heroes since 1962’s Fantastic Four #2. The green, reptilian aliens were shapeshifters and could assume the form of anyone. They made life miserable for Earth’s heroes, culminating in the epic Kree-Skrull war in the pages of Avengers. Even after that, they continued to create havoc, notably kidnapping the Thing’s girlfriend Alicia Masters, and replacing her with a Skrull agent. She married the Human Torch, creating a deep rift among the team. During this time, the planet eater Galactus destroyed the Skrull homeworld, leaving them a nomadic race. But they never lost sight of their plans for Earth.

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The first signs of a Skrull infiltration came in 2006 when an Avenger named Echo killed the assassin Elektra. Upon her death, Elektra transformed back to her natural Skrull state. This led to shockwaves throughout the superhero community. Who else had been replaced? This was especially shocking to the Illuminati, the secret cabal of heroes formed after the Kree-Skrull war. These included Iron Man, the Inhuman King Black Bolt, Black Panther, Professor Charles Xavier, Doctor Strange, Namor the Sub-Mariner, and the Fantastic Four’s Reed Richards. Black Bolt then revealed himself to be a Skrull and attacked the rest of the Illuminati.

Secret Invasion‘s Skrull Infiltration of the Marvel World Revealed

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In Secret Invasion, suddenly, every hero in the Marvel Comics universe was a suspect—especially heroes who had died and suddenly come back to life in previous years. Captain Mar-Vell had passed away from cancer years before and had only recently returned. Turns out, he, too, was a Skrull in disguise. Others replaced by Skrulls in Marvel Comics’ Secret Invasion event were Iron Man’s faithful butler Jarvis, the X-Man Longshot, and Brother Voodoo. The biggest blow came when Spider-Woman was discovered to be not only a Skrull, but the Skrull’s ruler Veranke.

Readers learned that the alien Princess Veranke was originally exiled by the Skrull Emperor Dorrek, but after Galactus destroyed the Skrull homeworld, Veranke became the new Empress. She was behind the invasion of Earth, gaining knowledge of Earth’s superhumans while posing as the heroic Spider-Woman. The real Jessica Drew was held captive when Veranke assumed her place.

All-Out War in Secret Invasion‘s Comics

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Once revealed in Secret Invasion, Marvel’s Skrulls infiltrated and disabled the S.H.I.E.L.D. Helicarrier, along with their orbiting base, The Peak. Skrulls instigated a massive breakout on the Raft, a supervillain high-security prison. The Secret Invasion comics’ climax saw a huge battle between Nick Fury’s collection of Marvel heroes and the Skrull Armada. Naturally, the heroes ultimately won. But it wouldn’t be one of the good guys who dealt the Skrull their killing blow, but former Green Goblin Norman Osborn.

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Those replaced by Skrulls came home, some after years away. But the failure of the Avengers and the other heroes to stop this massive infiltration did not go unnoticed by those in charge. The President of the United States dissolved S.H.I.E.L.D. and replaced it with a new organization called H.A.M.M.E.R. (Don’t ask what it stands for; that’s classified.) Norman Osborn took charge of H.A.M.M.E.R., kicking off a period in Marvel history known as the Dark Reign. For the next several years after Secret Invasion, villains ruled the day in Marvel Comics.

Who Do You Trust in Marvel Comics’ Secret Invasion?

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Of course, the MCU is very different than the comic book universe. There are no X-Men or Fantastic Four… yet. The only Kree-Skrull war we know of took place in the past during the events of Captain Marvel. Also, the biggest change is that in the MCU, many of the Skrulls are good guys, like Captain Marvel’s Talos. Ben Mendelsohn reprises his Talos role for Secret Invasion.

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The MCU’s Own Secret Invasion

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The MCU Secret Invasion is much, much more akin to an espionage thriller than a superhero epic—one with an alien twist. The only Avenger we’ve seen so far is James Rhodes, a.k.a. War Machine (Don Cheadle), who is working for the government (and might be a Skrull). Emilia Clarke plays G’iah, the daughter of Talos; we met her as a child in the climax of Captain Marvel. Now, G’iah works with other displaced Skrull refugees, many of whom are angry at how little the human race has done for them in terms of relocating her people to a new home.

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But where the original Secret Invasion comics were about which Marvel superheroes were replaced with Skrull agents, this series is all about replacing (mostly) ordinary humans in positions of power across the globe. Like many previous Marvel Studios projects, the MCU is taking the comics as inspiration for the premise of Secret Invasion and running with it. Big superhero battles seem very unlikely to happen in the series. However, one thing is certain: although the MCU’s Secret Invasion is sure to be different than the comic book version, we should expect massive changes to the universe as a result.

Originally published on December 15, 2020.