Before she succumbs to her infection, Hope sacrifices herself to bring the others to the camp, where they meet Vision, whose Mind Stone can reverse the virus's effects, exemplified by Lang's cured head being kept alive in a jar. However, the group also learns that Vision has been keeping a zombified Wanda Maximoff captive due to her resisting the Mind Stone and has been feeding other survivors to her, including T'Challa. Maximoff breaks free and kills Kurt, Okoye, and Barnes while Vision, unwilling to live without Maximoff, sacrifices himself to give up the Mind Stone so the others can cure the world with it.
Chauncey was the one to "spearhead" the episode, initially creating a draft with more gruesome deaths.: 2:38–3:00 He and Bradley were hesitant to have T'Challa appear without his leg because the racial implications of "a white couple [Vision and Wanda Maximoff] basically feasting off a man of color", but decided to include it as a reference to a significant part of the Marvel Zombies comic. They rationalized that losing a limb in a zombie apocalypse was "getting away easy" when compared to someone like Scott Lang, who ends up with his head in a jar.: 3:05–3:42 Other Easter eggs in the episode include a reference to the phrase "till the end of the line" from Captain America: The Winter Soldier (2014); an homage to the logo of Mutant Enemy Productions, the production company of the horror television series Buffy the Vampire Slayer (1997–2003); and the MCU's first mention of Peter Parker's Uncle Ben. This was included in early drafts of the script, and was kept despite Bradley and Chauncey expecting Marvel to request its removal.: 1:20–1:58
On August 7, 2021, Marvel announced a series of posters created by various artists to correspond with the episodes of the series, including a poster featuring zombified versions of Iron Man and Captain America in an apocalyptic New York City designed by Chris Christodoulou, as part of a series of posters for the series. Mira Jacobs of Comic Book Resources noted the "bleak" alternate universe depicted in the poster, as well as "a horde of zombies lurking in the darkness" and "a broken version of the Avengers logo". After the episode's release, Marvel announced merchandise inspired by the episode as part of its weekly "Marvel Must Haves" promotion for each episode of the series, including apparel, accessories, Funko Pops, Marvel Legends figures, and Lego minifigures based on the zombie versions of characters.
Despite his mostly negative feelings for the episode, Jorgensen was positive about the voice acting which is something he had criticized in earlier episodes. He specifically highlighted the performances of Gurira, Boseman, and Dastmalchian. Warmann, on the other hand, felt the series' voice acting was "more mixed than ever", criticizing the performances of Ruffalo and Stan. He felt Lilly gave the episode's strongest performance, and was shocked at how close Thames' voice was to Tom Holland's portrayal of Parker. Barsanti thought Thames did a fine job replacing Holland, and enjoyed Rudd's comedic performance as well as the visual joke of the Cloak of Levitation flying around with Lang's head in a jar. He was surprised at Boseman's role in the episode after the second episode had been presented as a farewell to the late actor. Opie, Barsanti, Jorgensen, and Warmann all highlighted Boseman's poignant line in the episode: "In my culture, death is not the end. They're still with us, as long as we do not forget them."
This infection is when the story diverges from the events of the film Ant-Man and the Wasp (2018). /wiki/Ant-Man_and_the_Wasp
This attack is when the story diverges from the events of the film Avengers: Infinity War (2018). /wiki/Avengers:_Infinity_War
Sciretta, Peter (March 12, 2019). "Exclusive: Marvel Studios Producing 'What If' TV Series For Disney+". /Film. Archived from the original on March 20, 2019. Retrieved March 20, 2019. https://www.slashfilm.com/what-if-tv-series-coming-to-disney-plus/
Dinh, Christine (April 12, 2019). "Marvel Studios Brings First Animated Series 'Marvel's What If...?' to Disney+". Marvel.com. Archived from the original on April 12, 2019. Retrieved July 29, 2021. https://www.marvel.com/articles/tv-shows/marvel-studios-brings-first-animated-series-what-if-to-disney-plus
Ashaari, Alleef (August 2, 2021). "Marvel's What If...? Crew Explains Why They Went 3D Over 2D & A Scrapped Episode That Was Too Close To GOTG 3". Kakuchopurei. Archived from the original on August 2, 2021. Retrieved August 2, 2021. https://kakuchopurei.com/2021/08/02/marvels-what-if-crew-explains-why-they-went-3d-over-2d-a-scrapped-episode-that-was-too-close-to-gotg-3/
Radulovic, Petrana (August 24, 2019). "Everything we learned at D23's Disney Plus presentation". Polygon. Archived from the original on August 24, 2019. Retrieved August 24, 2019. https://www.polygon.com/2019/8/24/20830613/d23-2019-disney-plus-marvel-she-hulk-wyatt-russell-star-wars-mandalorian-werner-herzog-new-shows
"What If..? Production Brief" (PDF). Disney Media and Entertainment Distribution. July 30, 2021. Archived (PDF) from the original on August 1, 2021. Retrieved August 1, 2021. https://lumiere-a.akamaihd.net/v1/documents/what_if_production_brief_final_07-29-21_02c60f04.pdf
Chauncey, Matthew (September 1, 2021). "What If... Zombies?!". What If...?. Season 1. Episode 5. Disney+. Opening credits occur from 0:42–1:43, with the end credits beginning at 28:00. https://www.disneyplus.com/video/ae1a734c-daf0-4ed0-87bc-61bbad60afc7
Barsanti, Sam (September 8, 2021). "What If...? meets Marvel Zombies as a surprising group of heroes fight off the walking dead". The A.V. Club. Archived from the original on September 8, 2021. Retrieved September 10, 2021. https://www.avclub.com/what-if-meets-marvel-zombies-as-a-surprising-group-1847635852
Howard, Kirsten (September 8, 2021). "What If...? Episode 5 Review: Magnificent Marvel Zombie Chaos". Den of Geek. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://www.denofgeek.com/tv/what-if-episode-5-review/
Jorgensen, Tom (September 8, 2021). "What If...? Season 1, Episode 5 – Review". IGN. Archived from the original on September 8, 2021. Retrieved September 9, 2021. https://www.ign.com/articles/what-if-episode-5-review
Davis, Brandon; Anderson, Jenna (January 5, 2024). What If..? Season 2 Live Q&A With Creative Team (A.C. Bradley, Matthew Chauncey, Bryan Andrews). ComicBook.com. Phase Zero. Retrieved January 5, 2024 – via YouTube. https://www.youtube.com/watch?v=kTLHpbhFCiA
"(#105) "What If... Zombies?!"". The Futon Critic. Archived from the original on September 8, 2021. Retrieved September 8, 2021. http://www.thefutoncritic.com/listings/20210817disney12/
Howard, Kirsten (September 8, 2021). "What If...? Episode 5 Review: Magnificent Marvel Zombie Chaos". Den of Geek. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://www.denofgeek.com/tv/what-if-episode-5-review/
Bradshaw, Paul (August 2021). "Chaos Theory". Total Film. p. 75. /wiki/Total_Film
Pulliam-Moore, Charles (August 3, 2021). "Doing Marvel Zombies Was a 'No-Brainer' Says What If Head Writer AC Bradley". io9. Archived from the original on August 6, 2021. Retrieved August 8, 2021. https://gizmodo.com/doing-marvel-zombies-was-a-no-brainer-says-what-if-head-1847409753
Breznican, Anthony (August 12, 2021). "What If Marvel's What If? Had Covered These Abandoned Story Lines?". Vanity Fair. Archived from the original on August 13, 2021. Retrieved August 14, 2021. https://www.vanityfair.com/hollywood/2021/08/what-if-marvel-unused-stories
Pulliam-Moore, Charles (August 3, 2021). "Doing Marvel Zombies Was a 'No-Brainer' Says What If Head Writer AC Bradley". io9. Archived from the original on August 6, 2021. Retrieved August 8, 2021. https://gizmodo.com/doing-marvel-zombies-was-a-no-brainer-says-what-if-head-1847409753
Breznican, Anthony (May 17, 2013). "Marvel's Phase 3: 'Doctor Strange,' 'Iron Man 4,' 'Hulk,' 'Inhumans'?". Entertainment Weekly. Archived from the original on January 25, 2021. Retrieved August 10, 2021. /wiki/Anthony_Breznican
Pulliam-Moore, Charles (August 3, 2021). "Doing Marvel Zombies Was a 'No-Brainer' Says What If Head Writer AC Bradley". io9. Archived from the original on August 6, 2021. Retrieved August 8, 2021. https://gizmodo.com/doing-marvel-zombies-was-a-no-brainer-says-what-if-head-1847409753
The GOAT Movie Podcast (September 9, 2021). What If Interview AC Bradley Marvel Head Writer Talks Spider-Man Uncle Ben, Zombies, Star Wars – via YouTube. https://www.youtube.com/watch?v=HdXl1wpkXNc
The GOAT Movie Podcast (September 9, 2021). What If Interview AC Bradley Marvel Head Writer Talks Spider-Man Uncle Ben, Zombies, Star Wars – via YouTube. https://www.youtube.com/watch?v=HdXl1wpkXNc
Ridgely, Charlie (September 8, 2021). "Marvel Fans Are Losing it Over Bucky Using Iconic Quote in New What If...?". ComicBook.com. Archived from the original on September 9, 2021. Retrieved September 9, 2021. https://comicbook.com/marvel/news/bucky-what-if-marvel-fans-captain-america-quote-zombies/#1
Kleinman, Jake (September 8, 2021). "Marvel Zombie 'What If' Has A 'Buffy' Easter Egg You Probably Missed". Inverse. Archived from the original on September 9, 2021. Retrieved September 9, 2021. https://www.inverse.com/entertainment/marvel-zombies-what-if-buffy-easter-egg
Russell, Bradley (September 8, 2021). "New What... If? features first MCU mention of iconic Spider-Man character". GamesRadar+. Archived from the original on September 8, 2021. Retrieved September 9, 2021. https://www.gamesradar.com/what-if-zombies-uncle-ben-mcu/
The GOAT Movie Podcast (September 9, 2021). What If Interview AC Bradley Marvel Head Writer Talks Spider-Man Uncle Ben, Zombies, Star Wars – via YouTube. https://www.youtube.com/watch?v=HdXl1wpkXNc
Sciretta, Peter (March 12, 2019). "Exclusive: Marvel Studios Producing 'What If' TV Series For Disney+". /Film. Archived from the original on March 20, 2019. Retrieved March 20, 2019. https://www.slashfilm.com/what-if-tv-series-coming-to-disney-plus/
Chitwood, Adam (September 8, 2021). "Here's the Full Voice Cast for 'Marvel's What If...?' Episode 5". Collider. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://collider.com/marvel-what-if-episode-5-voices-cast-list/
Chitwood, Adam (September 8, 2021). "Here's the Full Voice Cast for 'Marvel's What If...?' Episode 5". Collider. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://collider.com/marvel-what-if-episode-5-voices-cast-list/
Chitwood, Adam (September 8, 2021). "Here's the Full Voice Cast for 'Marvel's What If...?' Episode 5". Collider. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://collider.com/marvel-what-if-episode-5-voices-cast-list/
Collider Interviews (August 18, 2021). Why X-Men Aren't in Marvel's What If, According to EP Brad Winderbaum. Event occurs at 2:53–3:12 – via YouTube. /wiki/Collider_(website)
Labonte, Rachel (September 23, 2021). "Why Marvel's What If Spider-Man Actor Didn't Copy Tom Holland". Screen Rant. Archived from the original on September 24, 2021. Retrieved September 24, 2021. https://screenrant.com/marvel-what-if-spiderman-tom-holland-differences-why/
Huang, Nina (July 29, 2021). "Hasbro unveils new figurines for Marvel's What If...?, including Chadwick Boseman's T'Challa Star-Lord". Entertainment Weekly. Archived from the original on July 29, 2021. Retrieved July 29, 2021. https://ew.com/tv/marvel-what-if-disney-plus-hasbro-legends-figurine/
Chitwood, Adam (September 8, 2021). "Here's the Full Voice Cast for 'Marvel's What If...?' Episode 5". Collider. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://collider.com/marvel-what-if-episode-5-voices-cast-list/
Bankhurst, Adam; Fowler, Matt (September 8, 2021). "Marvel's What If...? Episode 5 Cast: Every Returning (and Replaced) MCU Actor". IGN. Archived from the original on September 9, 2021. Retrieved September 8, 2021. https://www.ign.com/articles/marvel-what-if-episode-5-cast-actors-characters
Silliman, Brian (September 8, 2021). "Episode 5 of 'What If...?' fills the MCU with zombies and hopelessness". SyFy Wire. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://www.syfy.com/syfywire/marvel-what-if-episode-5-zombies-recap
Bankhurst, Adam; Fowler, Matt (September 8, 2021). "Marvel's What If...? Episode 5 Cast: Every Returning (and Replaced) MCU Actor". IGN. Archived from the original on September 9, 2021. Retrieved September 8, 2021. https://www.ign.com/articles/marvel-what-if-episode-5-cast-actors-characters
Chauncey, Matthew (September 1, 2021). "What If... Zombies?!". What If...?. Season 1. Episode 5. Disney+. Opening credits occur from 0:42–1:43, with the end credits beginning at 28:00. https://www.disneyplus.com/video/ae1a734c-daf0-4ed0-87bc-61bbad60afc7
"What If..? Production Brief" (PDF). Disney Media and Entertainment Distribution. July 30, 2021. Archived (PDF) from the original on August 1, 2021. Retrieved August 1, 2021. https://lumiere-a.akamaihd.net/v1/documents/what_if_production_brief_final_07-29-21_02c60f04.pdf
Arrant, Chris (April 15, 2020). "Work on Marvel Studios' What If...? Continues During Coronavirus Pandemic". Newsarama. Archived from the original on April 17, 2020. Retrieved April 17, 2020. https://www.newsarama.com/49833-work-on-marvel-studios-what-if-for-disney+-continues-remotely-during-coronavirus-pandemic.html
Jones, Marcus (August 23, 2019). "What If on Disney+ will feature voices from majority of Marvel Cinematic Universe cast". Entertainment Weekly. Archived from the original on August 24, 2019. Retrieved August 24, 2019. https://ew.com/tv/2019/08/23/what-if-disney-voices-marvel-cinematic-universe/
Salazar, Andrew J. (September 6, 2019). "'What If...?' Showrunner Ashley Bradley Talks 'Trollhunters', The Beginning Of 'What If...?', Captain Carter, The Watcher & Star-Lord T'Challa (Exclusive)". Discussing Film. Archived from the original on September 22, 2019. Retrieved September 27, 2019. https://discussingfilm.net/2019/09/06/5806/
"What If..? Production Brief" (PDF). Disney Media and Entertainment Distribution. July 30, 2021. Archived (PDF) from the original on August 1, 2021. Retrieved August 1, 2021. https://lumiere-a.akamaihd.net/v1/documents/what_if_production_brief_final_07-29-21_02c60f04.pdf
What If...? [@whatifofficial] (September 12, 2021). "See the drop-dead stunning concept art from the fifth episode of Marvel Studios' #WhatIf, as seen in the credits. A new episode arrives Wednesday on @DisneyPlus" (Tweet). Archived from the original on September 12, 2021. Retrieved September 21, 2021 – via Twitter. /wiki/What_If...%3F_(TV_series)
"'What If... Zombies!?' Soundtrack Album Details". Film Music Reporter. September 9, 2021. Archived from the original on September 9, 2021. Retrieved September 9, 2021. http://filmmusicreporter.com/2021/09/09/what-if-zombies-soundtrack-album-details/
"'What If... Zombies!?' Soundtrack Album Details". Film Music Reporter. September 9, 2021. Archived from the original on September 9, 2021. Retrieved September 9, 2021. http://filmmusicreporter.com/2021/09/09/what-if-zombies-soundtrack-album-details/
Jacobs, Mira (August 7, 2021). "Marvel's What If...? Poster Shows a World Ravaged by Zombie Avengers". Comic Book Resources. Archived from the original on August 8, 2021. Retrieved September 6, 2021. https://www.cbr.com/what-if-poster-marvel-zombie-avengers/
Paige, Rachel (September 10, 2021). "Shop Marvel Must Haves: 'What If...?' Episode 5". Marvel.com. Archived from the original on September 11, 2021. Retrieved September 10, 2021. https://www.marvel.com/articles/gear/shop-marvel-must-haves-what-if-episode-5
Opie, David (September 8, 2021). "Marvel's What If...? finally addressed major missing piece of the MCU". Digital Spy. Archived from the original on September 8, 2021. Retrieved September 20, 2021. https://www.digitalspy.com/tv/ustv/a37508768/marvel-what-if-episode-5-uncle-ben/
Howard, Kirsten (September 8, 2021). "What If...? Episode 5 Review: Magnificent Marvel Zombie Chaos". Den of Geek. Archived from the original on September 8, 2021. Retrieved September 8, 2021. https://www.denofgeek.com/tv/what-if-episode-5-review/
Barsanti, Sam (September 8, 2021). "What If...? meets Marvel Zombies as a surprising group of heroes fight off the walking dead". The A.V. Club. Archived from the original on September 8, 2021. Retrieved September 10, 2021. https://www.avclub.com/what-if-meets-marvel-zombies-as-a-surprising-group-1847635852
Jorgensen, Tom (September 8, 2021). "What If...? Season 1, Episode 5 – Review". IGN. Archived from the original on September 8, 2021. Retrieved September 9, 2021. https://www.ign.com/articles/what-if-episode-5-review
Warmann, Amon (September 8, 2021). "Disney+'s 'What If' introduces zombies to the Marvel universe with mixed results". Yahoo! News. Archived from the original on September 8, 2021. Retrieved September 20, 2021. https://uk.movies.yahoo.com/disneys-what-if-zombies-mcu-120102843.html
Jorgensen, Tom (September 8, 2021). "What If...? Season 1, Episode 5 – Review". IGN. Archived from the original on September 8, 2021. Retrieved September 9, 2021. https://www.ign.com/articles/what-if-episode-5-review
Warmann, Amon (September 8, 2021). "Disney+'s 'What If' introduces zombies to the Marvel universe with mixed results". Yahoo! News. Archived from the original on September 8, 2021. Retrieved September 20, 2021. https://uk.movies.yahoo.com/disneys-what-if-zombies-mcu-120102843.html
Barsanti, Sam (September 8, 2021). "What If...? meets Marvel Zombies as a surprising group of heroes fight off the walking dead". The A.V. Club. Archived from the original on September 8, 2021. Retrieved September 10, 2021. https://www.avclub.com/what-if-meets-marvel-zombies-as-a-surprising-group-1847635852
Barsanti, Sam (September 8, 2021). "What If...? meets Marvel Zombies as a surprising group of heroes fight off the walking dead". The A.V. Club. Archived from the original on September 8, 2021. Retrieved September 10, 2021. https://www.avclub.com/what-if-meets-marvel-zombies-as-a-surprising-group-1847635852
Jorgensen, Tom (September 8, 2021). "What If...? Season 1, Episode 5 – Review". IGN. Archived from the original on September 8, 2021. Retrieved September 9, 2021. https://www.ign.com/articles/what-if-episode-5-review
Opie, David (September 8, 2021). "Marvel's What If...? finally addressed major missing piece of the MCU". Digital Spy. Archived from the original on September 8, 2021. Retrieved September 20, 2021. https://www.digitalspy.com/tv/ustv/a37508768/marvel-what-if-episode-5-uncle-ben/
Warmann, Amon (September 8, 2021). "Disney+'s 'What If' introduces zombies to the Marvel universe with mixed results". Yahoo! News. Archived from the original on September 8, 2021. Retrieved September 20, 2021. https://uk.movies.yahoo.com/disneys-what-if-zombies-mcu-120102843.html
Nolan, Liam (July 22, 2022). "SDCC Live: Marvel Studios Animation Panel Reveals Future of X-Men '97, What If and Marvel Zombies". Comic Book Resources. Archived from the original on July 22, 2022. Retrieved July 22, 2022. https://www.cbr.com/marvel-studios-animation-x-men-what-if-zombies-sdcc/
Penagos, Ryan; Cink, Lorraine; Iglehart, James Monroe (November 12, 2021). "First Look at Disney+: X-Men '97, Spider-Man details!". This Week in Marvel (Podcast). Event occurs at 24:52–25:14. Archived from the original on December 10, 2021. Retrieved December 15, 2021 – via Simplecast. – via Baculinao, Michael (November 17, 2021). "What If...? Producer Confirms Marvel Zombies Animated Series Setting". Epicstream. Archived from the original on November 17, 2021. Retrieved November 27, 2021. /wiki/James_Monroe_Iglehart
Nolan, Liam (July 22, 2022). "SDCC Live: Marvel Studios Animation Panel Reveals Future of X-Men '97, What If and Marvel Zombies". Comic Book Resources. Archived from the original on July 22, 2022. Retrieved July 22, 2022. https://www.cbr.com/marvel-studios-animation-x-men-what-if-zombies-sdcc/
Fang, Sam (November 15, 2024). "Marvel Zombies' Main Voice Cast Revealed With Many MCU Fan Favorites Confirmed". Comic Book Resources. Archived from the original on November 16, 2024. Retrieved November 15, 2024. https://www.cbr.com/marvel-zombies-main-voice-cast/
Fang, Sam (November 15, 2024). "Marvel Zombies' Main Voice Cast Revealed With Many MCU Fan Favorites Confirmed". Comic Book Resources. Archived from the original on November 16, 2024. Retrieved November 15, 2024. https://www.cbr.com/marvel-zombies-main-voice-cast/
Nattrass, JJ (October 14, 2022). "MCU Marvel Zombies Writer Reveals the Spinoff's Surprising Episode Count". Comic Book Resources. Archived from the original on October 14, 2022. Retrieved October 14, 2022. https://www.cbr.com/mcu-marvel-zombies-writer-reveals-surprising-episode-count/