Endgame: Part Two

"Endgame: Part Two" is the twenty-second and finale episode of the third season of Thor, and the sixty-sixth episode overall. It aired on May 12, 2020.

The episode is the second part of the three-part crossover, Endgame​. The episode was seen by 27.35 million U.S. viewers.

Synopsis
Reeling from their previous loss to Thanos, the remaining Avengers, split up throughout the universe, must reunite to take on Thanos and restore the lives of everyone lost.

Starring

 * Chris Hemsworth as Thor
 * Tom Hiddleston as Loki
 * LaMonica Garrett (credit only)
 * Tessa Thompson as Valkyrie
 * Matthew Gray Gubler as Bruce Banner/Hulk
 * Jimmy Smits (credit only)
 * Taika Waititi (credit only)
 * Amy Acker (credit only)

Special guest stars

 * Matt Bomer as Tony Stark/Iron Man
 * Justin Hartley as Steve Rogers/Captain America
 * Odette Annable as Natasha Romanoff/Black Widow
 * Mike Vogel as Clint Barton/Hawkeye
 * Sterling K. Brown as James Rhodes/War Machine
 * Adam Scott as Scott Lang/Ant-Man
 * Katee Sackhoff as Carol Danvers/Captain Marvel
 * Karen Gillan as Nebula
 * Bradley Cooper as Rocket
 * Josh Brolin as Thanos
 * Connie Britton as Frigga
 * Jennifer Love Hewitt as Jane Foster
 * Ross Marquand as Johann Schmidt/Red Skull
 * Ken Watanabe as The Ancient One
 * Zoe Saldana as Gamora
 * Jeremy Irons as Hank Pym
 * Chris Pratt as Peter Quill/Star-Lord

Guest starring

 * John Slattery as Howard Stark
 * Hayley Atwell as Peggy Carter
 * Frank Grillo as Brock Rumlow
 * James D'Arcy as Edwin Jarvis
 * Maximiliano Hernández as Jasper Sitwell
 * Victor Garber as Alexander Pierce

Plot
At the Avengers Facility, Banner and Stark have completed the construction of their own Quantum Tunnel and Advanced Tech Suit, preparing for test runs. Rhodes argues the suggestion of traveling back in time to kill 'baby Thanos' to which Banner explains that altering events in the past will not alter the present but will instead create an alternate universe; leaving the only feasible course of action of acquiring the Infinity Stones to restore everyone in the present time. Believing himself to be expendable, Barton volunteers for the first time travel test and is transported to a time period on his farm before the Snap. With disbelief and hope, he calls out to his daughter but is brought back to the present before she sees him. With the test proven a success, the Avengers proceed with the next phase of preparation: determining the location of each Infinity Stone in the past. This presents a challenge: as they possess a scarce supply of Pym Particles to operate with and no means of replenishing them because Hank Pym perished in the Snap, they only have enough for one round-trip each.

As the team discusses their past encounters with the Infinity Stones, they manage to recall the placement of each Infinity Stone in time. Fortunately, they realize the Time, Space, and Mind Stones were all present in 2012 New York City, in relatively close proximity with each other, following the Battle of New York. However, the other three Stones were only accessible to them in different places and times, with the Reality Stone being present on Asgard in 2013 (as explained to the remaining Avengers by Thor), and the Soul and Power Stones being present in 2014 on Vormir and Morag respectively. With their targets located, the Avengers split into three separate teams: Thor and Rocket to Asgard; Nebula and War Machine to Morag; Romanoff and Barton to Vormir; and Rogers, Stark, Banner, and Lang to New York.

In 2012 New York City, the team of Banner, Lang, Rogers, and Stark review their mission objectives and disperse. Banner heads over to the New York Sanctum where he encounters the Ancient One, who explains to Banner that Doctor Strange is not yet the Sorcerer Supreme in that time period and won't be for several years. Banner tries to persuade her to give him the Eye of Agamotto with the Time Stone, but his initial attempt fails, with the Ancient One sending Banner's astral form out of his body to protect the Stone. The Ancient One then educates Banner on the effects the Infinity Stones have on reality and possible ramifications that may result from the loss of just one. Though Banner makes a compelling argument, she is not convinced until he reveals that Strange willingly relinquished the Time Stone to Thanos, much to her surprise as she begins to realize that Strange's actions were part of a bigger plan. The Ancient One loans Banner the Time Stone and he promises to return it and the others once they've finished with them, before departing to rendezvous with the other Avengers.

Meanwhile, Stark and Lang infiltrate Stark Tower in the aftermath of the Battle of New York. After watching Loki's arrest, Stark departs in the Iron Man Armor: Mark LXXXV to the lobby area, carrying Lang. Lang plants himself onto Stark's 2012 counterpart who is transporting the Tesseract. However, the past Avengers are confronted by Alexander Pierce who wants to take the Tesseract from past Stark. Scott causes a distraction by interfering with the 2012 version of Stark's Arc Reactor and sending 2012 Stark into cardiac arrest, allowing a disguised 2023 Stark to secure the Tesseract and put it into his briefcase. Seemingly successful, 2023 Stark attempts to exit the area, but the 2012 version of Hulk bursts into the lobby from the stairwell in rage, causing Stark to drop the Tesseract. In the confusion, Loki manages to retrieve the Tesseract and use its power to escape captivity.

Meanwhile, A S.H.I.E.L.D. STRIKE team comprised of undercover HYDRA agents are taking Loki's Scepter with the Mind Stone to Dr. List, while Rogers sets out to retrieve it. Brock Rumlow, Jasper Sitwell, Jack Rollins and other undercover agents of HYDRA are transporting the Scepter by elevator. Rogers enters the elevator and presents the ruse that he has been ordered to take the Scepter, drawing suspicion from Rumlow and Sitwell, who doubt that Pierce has allowed a man outside of HYDRA to carry the weapon. Knowing that this will clear their suspicions, Rogers mutters, "Hail HYDRA," earning their trust and acquiring the Scepter. After getting the Scepter, Rogers, to his frustration, encounters his 2012 counterpart who mistakes him for Loki in disguise. The two begin to fight and 2012 Rogers gains the upper hand. Desperate, Present Rogers reveals to his past self that 2012 Bucky Barnes is still alive, much to the surprise of 2012 Rogers. Present Rogers uses the opportunity to reclaim the Scepter, which he uses to render his past self unconscious and escape.

The team of Lang, Rogers, and Stark regroup as Stark and Lang admit they botched their mission and there's no way to find the Tesseract now. However, Tony realizes that he can find a place and time where he can retrieve not just the Tesseract, but additional Pym Particles that they can use to return home. Scott is given the Scepter to return to the present while Stark and Rogers travel to Camp Lehigh in 1970.

Meanwhile, Thor and Rocket travel to 2013 Asgard. The pair are able to locate Jane Foster and set out to use a device to extract the Aether from her body. Thor, however, gets distracted at seeing his mother, knowing that she will die later that day at the hands of Kurse during the Sacking of Asgard. He then abandons Rocket to go get some mead but is caught by Frigga, who is fully aware that he is from the future. Thor breaks drown upon seeing his mother alive again and attempts to let her know of her future death, but she refuses to listen, insisting that Thor fix his own future rather than hers. Upon Rocket's retrieval of the Reality Stone and subsequent chase from Einherjar guards, Rocket interrupts Thor's talk with his mother, but he takes the chance to reclaim Mjølnir and say one final goodbye to his mother before he and Rocket return to the present.

Meanwhile, Rhodes, Nebula, Romanoff, and Clint time jump to 2014 Morag. Romanoff and Clint use the Benatar to travel to Vormir. Nebula and Rhodes go inside the Temple Vault and watch Star-Lord dance, both remarking on what a carefree idiot Quill was before knocking him out. They use his tools to break into the Vault and Nebula takes the Power Stone at the cost of her prosthetic arm being damaged. However, somewhere else in the universe aboard the Sanctuary II, the 2014 version of Thanos announces that Ronan the Accuser has found the location of the Power Stone; this information is shared with the 2014 versions of Gamora and Nebula when suddenly, the system in the 2014 version of Nebula starts interfacing with her 2023 self. Although present Nebula is unaware, the 2014 version of Nebula broadcasts her future self's visual feed. Thanos has his adoptive daughter examined by Ebony Maw and sees through footage from the future that he succeeds in his goals and the Snap, and after watching his decapitation at the hands of Thor in 2018, considers it "destiny fulfilled." The 2014 version of Nebula swears her loyalty to her father despite her seeming betrayal in the future, and Thanos decides to use her to achieve his goals quicker than he ever thought. A malfunctioning 2023 version of Nebula is stuck in 2014 while Rhodes travels back to the present time. 2023 Nebula is then found by the 2014 versions of Thanos and Nebula, who uses the present Nebula's time-traveling device to travel forward in time and impersonate her future self.

Meanwhile, Rogers and Stark arrive in 1970 as the Watcher Informant drives by, currently posing as a hippie. Rogers and Stark split up to locate the Pym Particles and find the Tesseract. Tony goes into the basement to look for the Tesseract in storage but is stunned when he runs into his dad Howard Stark, who is looking for Arnim Zola. He then gets to talk to his dad about his own birth, which is expected later the next month. Stark sees his father in a new light and, now a father himself, understands what he went through raising him. He manages to indirectly thank Howard for everything while maintaining his hidden identity. Rogers uses a distraction phone call to coerce Hank Pym into leaving his lab while he sneaks in and grabs the Pym Particles. On his way back, Rogers has to hide in an office, which turns out to be the office of Peggy Carter. He briefly reflects on the life he could have had with Carter and spots a photo of himself on her desk. He makes the rendezvous with Stark, who successfully obtained the Space Stone, and returns to the present.

Meanwhile, Romanoff and Barton are greeted on Vormir by Red Skull. Once they are informed of the sacrifice they have to make, the two argue over who should die for the Soul Stone and each forcibly attempt to stop the other. Both are ready to sacrifice themselves for the other as they both try to throw themselves off the cliff. Although Clint makes the jump, Romanoff saves him using her grappling hook and ends up hanging by his hand. Romanoff pleads with Clint to let her go, and despite Clint's refusal, forcibly lets go of his hand and falls to her death. A devastated Barton claims the Soul Stone and returns to the present without Romanoff.

The team returns to the New Avengers Facility in 2023 with all six Infinity Stones. They immediately notice the absence of Romanoff and Barton informs them of her death. The remaining Avengers take a moment by the lake to mourn her death before proceeding with their plan to use the Stones to not let Romanoff's sacrifice be in vain. Stark, with help from Banner and Rocket, creates a Nano Gauntlet to harness the stones, and Rocket starts a debate over who should use it. Thor insists upon being the one to wield it, claiming to be the strongest, but the others argue that using the gauntlet at full power channels more power than he's capable of safely handling both as a human and in his poor physical condition. Ultimately, Banner realizes that his physical form and relationship with gamma radiation make him the only safe candidate to use to the gauntlet. Banner puts the gauntlet on and it causes him intense pain as the energy from the stones surges through him. While several want him to take the gauntlet off, Rogers confirms that Banner is capable of continuing and Banner, despite great pain and difficulty, manages to put his fingers together and snap seconds later. As Banner collapses to the ground unconscious, Stark cools his scorched arm down as Ant-Man notices several birds seemingly appear outdoors out of nowhere, and Hawkeye receives a call from his wife, indicating that Hulk successfully reversed the Snap.

Just then, the 2014 version of Nebula activates the Quantum Tunnel to allow passage for Thanos' ship, the Sanctuary II, which carries an armada. Thanos opens fire on the facility, destroying the buildings. The 2014 version of Nebula returns to her father, who entrusts her with retrieving the stones while he waits for the Avengers. Back onboard the Sanctuary II, Gamora asks the future Nebula what happened between them. Nebula admits that she was determined to kill Gamora more than once, but the two eventually formed a bond as sisters and became friends. Gamora, who always had reservations about her commitment to Thanos, finally turns on him and frees present Nebula.