Infinity War: Part One

"Infinity War: Part One" is the thirteenth and finale episode of the first season of Doctor Strange, and the thirteenth episode overall. It aired on April 14, 2020.

The episode is the first part of the three-part crossover, Infinity War​.

Synopsis
The Mad Titan Thanos begins his quest for the Six Infinity Stones. Thor and the Asgardians are attacked, not knowing that Loki possesses the Tesseract, which Thanos is after. Meanwhile, Stephen gets an unusual warning that forces him to work with new allies – Iron Man and Spider-Man.

Starring

 * Benedict Cumberbatch as Stephen Strange/Doctor Strange
 * LaMonica Garrett (credit only)
 * Benedict Wong as Wong
 * Courtney Ford (credit only)
 * Mads Mikkelsen (credit only)
 * Ken Watanabe (credit only)

Special guest stars

 * Matt Bomer as Tony Stark/Iron Man
 * Chris Hemsworth as Thor
 * Matthew Gray Gubler as Bruce Banner/Hulk
 * Tom Holland as Peter Parker/Spider-Man
 * Tom Hiddleston as Loki
 * Mandy Moore as Pepper Potts
 * Josh Brolin as Thanos

Guest starring

 * Blair Underwood as Heimdall
 * Jacob Batalon as Ned Leeds
 * Terry Notary as Cull Obsidian
 * Tom Vaughan-Lawlor as Ebony Maw
 * Carrie Coon as Proxima Midnight
 * Michael James Shaw as Corvus Glaive
 * Kerry Condon as F.R.I.D.A.Y.

Plot
Deep in space, the Statesman has been attacked by the Sanctuary II, the ship of Thanos. Half of its passengers have been killed by the Black Order, the children of Thanos. One of them, Ebony Maw, announces that the survivors should rejoice in their defeat by Thanos. With Heimdall and Thor unable to even stand, Loki is brought before Thanos himself. Thor, Heimdall, and Loki soon find out that Thanos, wielding the Infinity Gauntlet already accommodating the Power Stone, had begun his quest of hunting down the Infinity Stones personally.

Thanos demands that Loki hand over the Tesseract, threatening to kill Thor if he doesn't comply. Loki initially hesitates, to which Thanos responds by torturing Thor with the Power Stone. Eventually, Loki can no longer see his brother suffer and reveals the Tesseract - which he had retrieved from Odin's Vault prior to Asgard's destruction - much to Thor's disappointment. However, Loki doesn't hand it over, and buys sufficient time for Hulk to attack Thanos and save Thor from Thanos' grasp. Unfortunately, Thanos quickly overpowers and subdues Hulk. Thor attempts to fight Thanos, only to be quickly defeated and immobilized in pieces of metal by Maw. With the Statesman's surviving members helpless against the power of Thanos, Heimdall saves Hulk's life by summoning the power of the Bifrost Bridge the last time and teleporting him to Earth and safe from harm.

In retaliation, Thanos kills Heimdall, leaving Thor in anguish. After this, the Tesseract - which had been left on the floor - is handed over to Thanos by Maw. Thanos crushes the Tesseract and inserts the Space stone within it into his gauntlet. Now in possession of two stones, Thanos orders his children to invade Earth and retrieve both the Mind Stone and the Time Stone. Loki then suddenly interrupts by pretending to pledge loyalty to Thanos. As he does so, he commits the bold yet fatal action of trying to kill Thanos with a dagger.

Thanos sees through Loki's attempt and foils him with his newly acquired stone, and proceeds to grab him by the neck. Thor only helplessly watches as Thanos breaks Loki's neck before his very eyes. Thanos uses the Power Stone to destroy the Statesman while he and the Black Order teleport away, leaving Thor to die as he mourns over his brother's dead body as the ship explodes around him.

Meanwhile, on Earth, Hulk crashes into the New York Sanctum via Bifrost and turns back into Bruce Banner, informing Doctor Strange and Wong about Thanos. Strange and Banner find Tony Stark, who is having a date with Pepper Potts, and bring him to the Sanctum as well. Strange, Wong, Banner, and Stark discuss the Infinity Stones, eventually surmising that Thanos is looking for both the Time Stone, held in the Eye of Agamotto,, and the Mind Stone, kept by Vision.

Banner insists that Thanos is the most formidable enemy they have ever faced, revealing that he was Loki's sponsor during the Battle of New York and will wipe out half the universe if he completes the Infinity Gauntlet. Stark suggests simply destroying the Time Stone since they've got it on hand, but Strange refuses as he and Wong have pledged to protect it with their lives. Banner asks where Vision is, and Stark admits that he's lost track of him. Stark brings Banner up to date with everything that happened since he left Earth; the Avengers have disbanded, and he is no longer on speaking terms with Steve Rogers. Banner implores Stark to call Rogers, insisting that whatever happened between them doesn't matter compared to what is coming. Convinced, Stark takes out the phone Rogers sent him after the Avengers Civil War and prepares to make the call.

Before he can, however, an ominous hum rings through the air, accompanied by a change in air flow. A massive, ring-shaped Q-Ship hovers above New York City, causing panic and fear in the streets. Strange manages to shut the ship's engine off as Ebony Maw and another of Thanos' children, the hulking Cull Obsidian, approach them. While Strange, Stark, Wong and Banner confront the invaders, the Q-Ship is witnessed from afar by Peter Parker, who rushes in to investigate. A turbulent battle erupts in the streets, but Banner finds himself unable to transform into Hulk, despite his best attempts.

As Wong fights Cull, trapping him in the Arctic with his Sling Ring, Ebony Maw, a fierce telekinetic, successfully abducts Strange, with Time Stone in tow. Unbeknownst to Maw, however, both Iron Man and Spider-Man - who is granted his Iron Spider Armor - manage to stow away in Maw's Q-Ship. As Wong returns to the sanctum to protect it, Banner finds Stark's phone and decides to call Rogers himself.