In “The Ricklantis Mixup,” the main Rick and Morty go offscreen to Atlantis.
The episode opens with Rick preparing what he calls a self-contained adventure in Atlantis. Before the audience sees that story, another Rick and Morty arrive asking for donations to help rebuild the Citadel after its destruction. The episode then shifts almost entirely to the Citadel and follows several alternate Ricks and Mortys instead.
Atlantis is confirmed in the post-credits scene, when the main duo returns home satisfied with their trip. The deliberate offscreen adventure creates the episode’s central joke: the title suggests a Rick-and-Morty journey, but the narrative actually becomes an ensemble political and social satire about the Citadel.
The episode is also known as “Tales from the Citadel.” It is season 3’s seventh episode, written by Dan Guterman and Ryan Ridley and directed by Dominic Polcino. Anatomy Park, Gazorpazorp, and Pluto are locations from other Rick and Morty stories, not the destination mentioned here.