Warning: SPOILERS ahead for Dune and Dune 2
Despite playing a prominent role in the early part of the movie, it's unclear what happens to Caladan in Dune after House Atreides leaves for Arrakis. The lush, oceanic home-world of the Atreides at first seems like it might be of significance in the story. A large chunk of the movie's initial character development and exposition takes place there, and the planet includes a number of potentially important settings like Castle Caladan and the graveyard
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