In the fascist shrimp reality sequence, the two characters who beat Rick to death are caricatures of Nazi leaders: Heinrich Himmler, head of the SS, and his lieutenant Reinhard Heydrich, chief of the Gestapo.
Gravity Falls (2012) creator Alex Hirsch can be seen, when Morty is shown on TV making weird noises. He is watching television with his parents and drops a bowl of popcorn.
The show was renewed for season 4 and six more seasons.
On May 15, 2019 Adult Swim announced that Rick and Morty season 4 would be premiering in November 2019.