"The finale actually examines it in a really cool way that Morty’s been corrupted by this relationship in a lot of ways, but he’s basically forced to corrupt Rick to get what he wants," Marder said.
The current voice cast features Ian Cardoni as Rick Sanchez and Harry Belden as Morty Smith, alongside Sarah Chalke, Chris Parnell, and Spencer Grammer.
Viewers without cable can stream the episode via DIRECTV and Sling, while streaming on HBO Max and Hulu follows on August 17 after a three-week delay.
Adult Swim has renewed the series through Season 12, ensuring its run through at least 2029.
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A spinoff titled "President Curtis" premiered immediately after the Season 9 finale, and a feature-length film directed by Jacob Hair is in development.
