Tony Stark in Iron Man 3

If You’re Confused About Extremis, It’s Time To Revisit ‘Iron Man 3’

During the second episode of Secret Invasion, titled “Promises,” G’iah (Emilia Clarke) is looking through a computer to see about these “creatures” that some Skrull scientists were talking about. One of those “creatures” is labeled as Extremis, an important part of Marvel lore. The thing is, if you’re not overly familiar with Tony Stark’s story in the Marvel Cinematic Universe, you might not remember where Extremis started.

Recommended Videos

Introduced in Iron Man 3, Extremis was the creation of Maya Hansen (Rebecca Hall) and Aldrich Killian (Guy Pearce). Using nanotechnology, the idea is that a human with Extremis can heal and regenerate after an injury; it can also even heal psychological damage. Using Extremis isn’t easy, though, and many who try end up dying before they bond with it. One of the few who successfully used Extremis was its co-creator Killian, who was Tony’s villain in Iron Man 3. While a lot of Iron Man 3 was about Tony’s growth as a hero and his mental health, we also got to see a lot of what Extremis could do.

Extremis has since been littered throughout the Marvel world and reappears from time to time. Daisy Johnson on Agents of S.H.I.E.L.D. had her brush with it (along with other characters), and we saw as Pepper Potts had to be “stabilized” after her own encounter. It is interesting that it’s making a reappearance now in Secret Invasion because there are two connections back to this: The Tony Stark world that we’ve left behind after Avengers: Endgame and the rumored return of Chloe Bennet as Daisy/Quake in the Marvel Cinematic Universe.

Could this Extremis shout-out mean we’ll go back to either of these characters? Or is it just a callback?

Happy to force people to watch Iron Man 3, a good movie

Iron Man 3 often gets unfairly shafted when discussing the best Marvel movies. It is the third in the Iron Man franchise starring Robert Downey Jr. and is the only one directed by Shane Black, who had previously directed Downey in Kiss Kiss Bang Bang. Iron Man 3 is a Christmas movie, and one that shows the darker side of being a superhero and the struggle that these characters have with their place in this heroic world.

The creation of Extremis was personal to Tony because he helped fund both Killian and Hansen. Now, having Extremis pop up in the Marvel Cinematic Universe without Tony—and in one where Gwyneth Paltrow’s Pepper Potts is not really involved anymore—is definitely interesting. Personally, I do think this might be a way of bringing in Daisy Johnson, but it also gives me a reason to tell everyone that Iron Man 3 actually is a great movie. And if you want to learn more about how Extremis works, you can listen to Aldrich Killian lecture Tony Stark about it.

Simply put: Extremis is a bit of nanotech that is supposed to help you heal but also increases your body temperature and doesn’t always pair well with people. So … hopefully the show doesn’t use it as a weapon.

(featured image: Walt Disney Studios Motion Pictures)


The Mary Sue is supported by our audience. When you purchase through links on our site, we may earn a small affiliate commission. Learn more
related content
Read Article How Many Seasons Of Bridgerton Will There Be?
The Bridgerton extended family.
Read Article Daphne Bridgerton Got Her Happy Ending. So Where Is She Now?
Simon and Daphne at the ball in Season 1 of Bridgerton
Read Article Here’s How Penelope’s Father’s Fate Matches Up With the ‘Bridgerton’ Books
The Featherington family drinks champagne in Bridgerton
Read Article Everything Coming to Paramount+ in May 2024
Jeremy Renner in Mayor of Kingstown
Read Article If You Want to Get In on ‘Bridgerton,’ You’ve Only Got One Option
Key art for Bridgerton season 3 on Netflix, with Colin Bridgerton, Peneope Featherington, Queen Charlotte, Anthony and Kate Bridgerton, and more all featured. Colin and Penelope stand in front of a mirror.
Related Content
Read Article How Many Seasons Of Bridgerton Will There Be?
The Bridgerton extended family.
Read Article Daphne Bridgerton Got Her Happy Ending. So Where Is She Now?
Simon and Daphne at the ball in Season 1 of Bridgerton
Read Article Here’s How Penelope’s Father’s Fate Matches Up With the ‘Bridgerton’ Books
The Featherington family drinks champagne in Bridgerton
Read Article Everything Coming to Paramount+ in May 2024
Jeremy Renner in Mayor of Kingstown
Read Article If You Want to Get In on ‘Bridgerton,’ You’ve Only Got One Option
Key art for Bridgerton season 3 on Netflix, with Colin Bridgerton, Peneope Featherington, Queen Charlotte, Anthony and Kate Bridgerton, and more all featured. Colin and Penelope stand in front of a mirror.
Author
Rachel Leishman
Rachel Leishman (She/Her) is an Assistant Editor at the Mary Sue. She's been a writer professionally since 2016 but was always obsessed with movies and television and writing about them growing up. A lover of Spider-Man and Wanda Maximoff's biggest defender, she has interests in all things nerdy and a cat named Benjamin Wyatt the cat. If you want to talk classic rock music or all things Harrison Ford, she's your girl but her interests span far and wide. Yes, she knows she looks like Florence Pugh. She has multiple podcasts, normally has opinions on any bit of pop culture, and can tell you can actors entire filmography off the top of her head. Her work at the Mary Sue often includes Star Wars, Marvel, DC, movie reviews, and interviews.