Thor: RagnarokSave

We open with Thor hanging upside-down in a metal cage in the bowels of Muspelheim, having a one-sided conversation with a fire demon named Surtur. It's the funniest opening scene of any MCU film up to this point — and a deliberate signal that the franchise has shifted gears entirely. Thor escapes, takes Surtur's crown of fire, and returns to Asgard to find Loki impersonating their father Odin and running the realm like a Roman emperor. Their reunion is brutal and immediate. Thor drags Loki to Earth to find their real father.

Odin is dying. He has been quietly preparing for this for years. He tells the brothers, on a cliff in Norway, that his death will unleash their long-imprisoned older sister Hela — the Goddess of Death, exiled by Odin centuries ago for being too violent even by Asgard's conquest-era standards. Then he turns to golden light and disappears. Hela arrives, summoned by the death. She destroys Mjolnir with one hand. Thor and Loki try to flee through the Bifrost. Hela follows, knocks them both out, and rides Bifrost down to Asgard alone to claim her throne. Thor lands on a junkyard planet called Sakaar.

Sakaar is ruled by the Grandmaster (Jeff Goldblum), Elders of the Universe, gladiator-game enthusiast, professional sadist. Thor is captured by a former-Asgardian-Valkyrie-turned-bounty-hunter named Brunnhilde (Tessa Thompson), sold to the Grandmaster, and forced into combat as Sakaar's newest gladiator. His opponent: the Champion of Sakaar. The crowd cheers. Thor cheers. Then the Champion enters the arena.

It is the Hulk. Banner has been the Hulk for two years straight since his disappearance at the end of Avengers: Age of Ultron (2015). He has been the Champion for most of that time, has his own bedroom suite, has been on a winning streak. He is also, in this state, more verbal than he has ever been on screen — speaking in full sentences for the first time in any MCU film. Thor's plan changes. He needs Hulk's help to get back to Asgard, where Hela is now genocidally executing the Asgardian population.

Thor, Banner, Valkyrie, and Loki escape Sakaar by stealing a Grandmaster spaceship through a giant portal called the Devil's Anus. They arrive at Asgard to find Hela's reign already in full effect — execution squads, monuments to her dead generals, hundreds of dead. The final battle is fought on the rainbow Bifrost bridge. Thor unlocks his lightning powers without Mjolnir for the first time, channeling pure Odin-force. Loki betrays no one. Hela cannot be killed; she draws power from Asgard itself.

Thor's solution is genocide-by-mythology. He sends Loki into Odin's vault to release the imprisoned Surtur — the same fire demon from the opening scene. Surtur grows to skyscraper size, fulfills the prophesied Ragnarok, and razes Asgard to ash. Thor's people escape on the Sakaar ship before Surtur's flame consumes the realm. Hela is killed in the destruction. Asgard, as a physical place, ceases to exist.

The film closes with Thor — now wearing an eyepatch, having lost an eye in the Hela fight — leading the surviving Asgardians toward Earth on the Sakaar ship. Then a massive shadow falls across them. The opening scene of Avengers: Infinity War (2018) picks up from this exact frame. Thanos's ship has arrived. The mid-credits is a Loki-confronts-Thanos scene. The post-credits is a Grandmaster blink in front of an angry Sakaaran crowd: 'It's still a tie.'

Thor: Ragnarok grossed $854 million globally — the highest-grossing Thor film of the trilogy at release. Critics responded to it as the moment the MCU franchise figured out how to be funny, weird, and emotionally serious at the same time. Waititi's tonal experiment became the new MCU template. Every subsequent ensemble film borrowed from its rhythm.