Rick's backstory montage explains that C-137 Rick created the Citadel after trying to hunt down the version of him that killed his wife and child, quickly growing frustrated with his inability to do so. Related: Rick and Morty: Evil Morty History & Backstory, Explained This finale reveal is important not just in terms of fleshing out one of the titular duo, but also in that it does something previously unthinkable: it gives the show a viable endpoint. The episode provides some explanations to the previously entirely mysterious plans of Evil Morty, explains why the Citadel of Ricks came into existence, and - perhaps most surprisingly - appears to confirm C-137 Rick's actual backstory. Rick and Morty season 5 episode 10 contains a boatload of revelations that either suggest or outright explain answers to long-held questions that viewers have speculated about for several years. What this does mean, however, is that when such episodes occur, they tend to be even more crucial in terms of what information they do dole out - with Rick and Morty's season 5 finale being a prime example of this.

The adventures of Rick Sanchez and his grandson Morty Smith tend to avoid having large ongoing plots, with only a few episodes over the course of the show's five seasons having anything close to a linked narrative. Rick and Morty season 5 sets up a potential ending for the entire of the show - even if it's one that is in no way likely to happen soon.

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