Rick and Morty is a science fiction comedy on [adult swim] for teenagers and adults. It is about alcoholic scientist Rick Sanchez and his grandson Morty Smith as they go through all kinds of weird interdimensional time travel adventures. They canonically appeared as themselves in a brief crossover appearance on The Simpsons, in the couch gag for the episode Mathlete's Feat. It's also said that Rick knows who the Simpsons are and may be a TV show in the Rick and Morty universe.
Sideshow Bob's Last Gleaming/Gallery Simpsons art, Sideshow, The simpsons
Morty Smith, Fictional Characters Wiki
Rick and Morty couch gag - Wikisimpsons, the Simpsons Wiki
Rick Sanchez, Simpsons Wiki
Dan Harmon - Wikipedia
Harry Potter - Wikisimpsons, the Simpsons Wiki
Thanos, Simpsons Wiki
Homer's Evolution couch gag, Simpsons Wiki
List of couch gags - Wikisimpsons, the Simpsons Wiki