Thor: Ragnarok (2017) Timeline Explained – Every Event in Order

Surtur reveals that Ragnarok can be triggered when his crown is united with the Eternal Flame in Odin's vault. He tells Thor this because he wants Thor to understand that Asgard's destruction is inevitable and cannot be stopped. Surtur believes he is destined to destroy Asgard, so he sees no harm in revealing his plan to Thor.

Foreshadowing: Earlier in the timeline, Thor was on a quest for the Infinity Stones which led him directly to Muspelheim.

• surtur
• ragnarok
• eternal flame
• asgard destruction
• prohecy

Loki impersonated Odin to seize control of Asgard after the events of previous films. He used his shapeshifting abilities to take Odin's place on the throne. Thor discovers this deception when he returns home, finding that his brother has been ruling Asgard in their father's absence while pretending to be Odin.

Foreshadowing: This deception explains why Heimdall went into hiding, he suspected Loki's treachery.

• loki
• odin
• impersonation
• asgard throne
• deception

Hela is freed when Odin dies in Norway. Odin reveals to Thor and Loki that Hela is his firstborn child, the Goddess of Death, who was cast out of history and imprisoned because of her ruthless ambition for conquest. Upon Odin's death, the ancient seal keeping Hela trapped is broken, allowing her to emerge and return to Asgard.

Foreshadowing: Odin specifically warns Thor that his death will unleash his firstborn, setting up Hela's inevitable return.

• hela
• odin
• goddess of death
• prison
• prophecy

Hela easily destroys Mjolnir because she possesses power that surpasses Thor's hammer. As the Goddess of Death and Odin's firstborn, Hela's strength is formidable enough to break the enchanted uru hammer. The moment Thor and Loki attempt to flee through the Bifrost, Hela pursues them and demonstrates her overwhelming power by shattering Mjolnir into fragments.

Foreshadowing: This moment establishes Hela as an antagonist far more powerful than any Thor has faced before.

• mjolnir
• hela
• destruction
• hammer
• power

The Hulk has lost all memory of his time as Bruce Banner and his past adventures with the Avengers, including Thor. When Thor crash-lands on Sakaar and faces the Hulk in the Grandmaster's arena, the Hulk treats Thor as a stranger and fights him without recognition. This memory loss is a consequence of the Hulk being in control for two years since the Sokovia incident.

Foreshadowing: This explains why Banner was unable to transform back into human form for so long.

• hulk
• banner
• amnesia
• gladiator
• sakaar
• memories

Thor realizes that conventional means cannot defeat Hela, as she is too powerful and has already decimated Asgard's forces. After receiving a vision of Odin that awakens his true powers, Thor understands that only Ragnarok, the prophesied destruction of Asgard, can stop Hela. By using the Eternal Flame to resurrect Surtur, Thor triggers the very event he initially sought to prevent, sacrificing Asgard to save his people.

Foreshadowing: This decision completes Thor's character arc from a king who protects his realm to one who accepts necessary destruction for rebirth.

• ragnarok
• hela
• surtur
• eternal flame
• asgard destruction

Thor and Loki use Odin's Eternal Flame to resurrect Surtur. After Thor's vision of Odin grants him clarity, he instructs Loki to retrieve the Eternal Flame from Odin's vault. They use this ancient flame to bring Surtur back to life, and the fire demon immediately begins fulfilling his destiny by destroying Asgard, and Hela along with it.

Foreshadowing: The Eternal Flame was originally meant to power Ragnarok, which Surtur had threatened to use throughout the film.

• surtur
• eternal flame
• resurrection
• loki
• asgard

The surviving Asgardians escape aboard the Grandmaster's massive spaceship. Thor, now embracing his role as king, leads his people away from the destroyed realm. In the film's mid-credits scene, their ship is intercepted by a massive spacecraft belonging to Thanos, setting up the events of Avengers: Infinity War.

Foreshadowing: This establishes Thor's new role as leader of his people and sets up the next chapter in the MCU.

• asgardians
• escape
• thor
• king
• spaceship
• thanos

Skurge initially cooperates with Hela because she threatens to kill him otherwise. As theExecutioner, he has no choice but to serve the Goddess of Death when she takes over Asgard. However, at the crucial battle, Skurge redeems himself by sacrificing his life to hold off Hela's forces, allowing the remaining Asgardians to escape through the Bifrost.

Foreshadowing: This redemption arc completes Skurge's journey from minor antagonist to unlikely hero.

• skurge
• hela
• redemption
• sacrifice
• executioner

Loki betrays Thor by aligning himself with the Grandmaster, hoping to gain favor and power on Sakaar. When Thor is captured, Loki sees an opportunity to advance his own interests rather than help his brother. However, Loki eventually changes sides and assists Thor in the rebellion against the Grandmaster, showing his complicated relationship with Thor.

Foreshadowing: This betrayal and subsequent reversal mirrors Loki's classic pattern of shifting loyalties throughout the MCU.

• loki
• grandmaster
• betrayal
• sakaar
• alliance

Thor learns to channel his lightning powers without Mjolnir during his fight with the Hulk in the Sakaar arena. Even though Mjolnir has been destroyed by Hela, Thor discovers his true potential when he taps into his own innate power. This ability is fully awakened after his vision of Odin, which helps him understand that his worth comes from within, not from his weapons.

Foreshadowing: This development sets up Thor's evolution into a more powerful version of himself.

• thor
• lightning
• mjolnir
• powers
• odin's vision

Sakaar is a chaotic garbage planet surrounded by wormholes that randomly pull in objects and people from across the universe. After Hela casts Thor and Loki adrift in space through the Bifrost, Thor crash-lands on Sakaar. He is captured by Scrapper 142 and sold to the Grandmaster, who forces him to fight as a gladiator without his hammer.

Foreshadowing: The wormholes explain how both Thor and the Hulk ended up on this remote planet.

• sakaar
• grandmaster
• gladiator
• wormhole
• capture