Get ready for a multiverse of mind-blowing adventures as Marvel’s What If…? Season 3 hurtles towards its epic finale! The official episode list for the final season is now out, giving fans a sneak peek at the captivating stories that await.
Confirmed as Marvel Studios’ last project of 2024, What If…? Season 3 will deliver eight thrilling episodes. We can expect more mind-bending twists on familiar MCU narratives, featuring alternate-reality versions of beloved characters embarking on exciting escapades across the vast multiverse.
Led by Jeffrey Wright’s enigmatic Watcher, Season 3 promises a reunion with established characters from seasons 1 and 2, alongside exciting new additions from Phase 4 and 5 who haven’t graced the animated series yet. The season culminates in a spectacular final showdown that fans can only speculate about, keeping the MCU fandom on the edge of their seats.
All What If Season 3 Episodes: Titles, Names & Release Dates
Episode 1: “What If…The Hulk fought the Mech Avengers?”
Release: Sunday, December 22, 2024
Season 3 kicks off with a colossal brawl as Mark Ruffalo’s Bruce Banner, in an attempt to cure himself, unleashes a monstrous transformation. The Mech Avengers, led by Anthony Mackie’s Sam Wilson as a battle-ready Captain America in a formidable mech suit, will stand against the heroic-turned-rampaging Hulk. Joining them are Teyonah Parris’ Monica Rambeau, Sebastian Stan’s Bucky Barnes, David Harbour’s Red Guardian, and the animated version of Moon Knight. Together, they’ll unleash every ounce of power to safeguard the world from Hulk-sized disaster.
Episode 2: “What if…Agatha went to Hollywood?”
Release: Monday, December 23, 2024

Dominic Cooper takes center stage in Episode 2 as Howard Stark embarks on a journey in the film industry with his newly founded Stark Pictures. He becomes captivated by Kathryn Hahn’s Agatha Harkness, his leading lady, but the script gets a shake-up with the arrival of a superpowered co-star — Kumail Nanjiani’s Kingo. This intriguing adventure brings together characters from stories centered around Captain America, Wanda Maximoff, and the Eternals, promising a unique and exhilarating ride. James D’Arcy also joins the cast as Edwin Jarvis.
Episode 3: “What If…The Red Guardian stopped the Winter Soldier?”
Release: Tuesday, December 24, 2024

Set in 1991, Episode 3 sees David Harbour’s Red Guardian on a high-stakes mission to prove his worth to the Red Room. He unexpectedly intercepts the Winter Soldier’s mission to kill Howard Stark, forcing them into a surprising alliance after altering the events fans know from Captain America: Civil War. Harbour teams up with Sebastian Stan and Laurence Fishburne’s Bill Foster. Joining them in an undisclosed role is America Ferrera, known for her breakout role in 2023’s blockbuster Barbie.
Episode 4: “What If…Howard the Duck got hitched?”
Release: Wednesday, December 25, 2024

Continuing their unconventional love story from Season 2, Darcy Lewis and Howard the Duck embark on an intergalactic pleasure cruise in Episode 4. Their romantic getaway takes a turn for the worse when powerful intergalactic threats emerge, forcing the unlikely couple to uncover hidden cosmic powers to survive. Kat Dennings and Seth Green reprise their roles as the dynamic duo. Tom Hiddleston returns as Loki, alongside Samuel L. Jackson as Nick Fury and Michael Rooker as Yondu Udonta.
Episode 5: “What If…The Emergence destroyed the Earth?”
Release: Thursday, December 26, 2024

Episode 5 takes fans to a somber reality where the Eternals failed to stop The Emergence. Dominique Thorne returns as Riri Williams/Ironheart, alongside Emily VanCamp’s Sharon Carter and Tessa Thompson’s Valkyrie, confronting a world ravaged by the disaster. Mysterio, from Spider-Man: Far From Home, steps into a crucial leadership role as the head of a dystopian regime. We are left wondering if Jake Gyllenhaal will return to portray Mysterio in this dark turn.
Episode 6: “What If…1872?”
Release: Friday, December 27, 2024

This episode takes us on a historical adventure. Simu Liu and Hailee Steinfeld lead the charge alongside the return of Wyatt Russell as John Walker, Meng’er Zhang as Xu Xialing, and Walton Goggins as Sonny Burch. The question remains: Will Anthony Ramos reprise his role as The Hood in animation before his live-action debut in Ironheart?
Episode 7: “What If…The Watcher disappeared?”
Release: Saturday, December 28, 2024

Episode 7 puts the series in a precarious position as The Watcher stands trial for his actions across all three seasons. With his omnipresent status challenged, the MCU heroes must step up in unprecedented ways to save him. Alongside the return of Hayley Atwell as Captain Carter, Natasha Lyonne joins the cast as a new MCU superhero named Byrdie.Jason Isaacs from Harry Potter fame adds to the mystery with an undisclosed role.
Episode 8: “What If…What If?”
Release: Sunday, December 29, 2024

Marvel is keeping its secrets close to the chest for the series finale, only revealing that it is “The end of the beginning…” The same voice cast from Episode 7 returns, alongside Devery Jacobs as Kahhori and Alison Sealy-Smith as Storm: Goddess of Thunder. This last act promises a historic MCU crossover between the Avengers and X-Men, setting the stage for an epic conclusion, and raising the question: What new realities await?
What If…? Season 3 kicks off streaming on Disney+ on Sunday, December 22nd – marking the first time any Disney+ show has premiered on a Sunday. Are you ready to revisit the multiverse?