- For the eponymous reality, see Legion of Doom's alternate reality.
- "Well, it looks like you losers managed to remember who you are. I should've wiped you from existence when I had the chance! Do you have any idea how infuriating it is to know that Merlyn was right?! Lucky for you I believe in some fates worse than death, like me destroying the Spear and cementing this reality for all time."
- —Eobard Thawne to the Legends
After obtaining the Spear of Destiny, the Legion of Doom rewrites reality, leaving the Legends changed, perhaps forever. Frightfully, the Legends' and the world's hopes rest with Rory, but being the "hero" is not easy for him. Meanwhile, there is tension within the Legion of Doom and the reason why the Spear of Destiny needs to be destroyed is revealed.
Preparation ran from January 23 until January 31, 2017. Shooting began on February 1 and ran February 10, 2017.
- Leonard Snart mentions escaping from prison as a pastime of his and Mick's. This is likely a reference to the actors' roles on the TV series Prison Break.
- As Eobard is on the phone with the President of the United States, he mentions golfing and that the President owns a hotel, as well as wishing "Mel" the best. This is a reference to the current real-world President Donald Trump and his wife, First Lady Melania Trump. Ironically, Trump was not the President in the pre-Doomworld timeline.
- Jax asks Mick how he knows what Aramaic sounds like, and Mick says it's because of the 2004 film The Passion of the Christ. Ironically, the film features Christ on the cross getting stabbed with a spear, which is what would become the very Spear of Destiny that the aforementioned Aramaic text spoke of.
- Thawne's nuclear reactor building is a reference to the original Legion of Doom headquarters from the classic Super friends series, since Thawne leads the Legion of Doom in the Arrowverse.
- Like in the penultimate episode "" of the previous season, this episode, the penultimate of this season, featured a big main character death in the end that will motivate the team for the finale (although in this case, the Legends were able to undo this death in the finale).
- As in the beginning of the season, Nate Heywood had come to someone with a high position, forcing his way through their security, when he realized that something was wrong with the Legends. And like before, it was him and Mick who went and began gathering the Legends back together.
- With the change in the timeline in the next episode, "" all of the events of this episode were erased from existence. Also, the remnant of Eobard Thawne from Doomworld was killed by the Black Flash.
- ↑ Legends of Tomorrow Spoilers: “Doomworld” Description - DCLegendsTV
- ↑ Marc Guggenheim (@mguggenheim) - Twitter
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