The Ricks Must Be Crazy

On a trip to an alternate dimension, Rick, Morty, and Summer discover that Rick's car battery is malfunctioning. Rick takes Morty inside the car battery to repair it and leaves Summer waiting in the car, instructing it to "Keep Summer safe." Morty discovers that the car battery is actually a 'microverse battery', containing an entire universe to supply power to the car. Rick gave "gooble box" technology to an intelligent species to generate electricity, but unbeknownst to them he takes a majority of the generated power. This leads Morty to question Rick's ethics.

Rick and Morty discover that a scientist and microverse citizen named Zeep Xanflorp (Stephen Colbert) has made his own 'miniverse', which renders gooble boxes obsolete. Rick, Morty and Zeep enter the miniverse, and discover that Kyle, a scientist living in Zeep's battery, is also working on his own 'teenyverse', which Morty and the three scientists enter. Once both Zeep and Kyle discover that they are slaves born to make electricity, Zeep attacks Rick in a rage. During the struggle, Kyle commits suicide using his spaceship, leaving Rick, Morty, and Zeep stranded in the teenyverse.

Several months later (in teenyverse time), Rick and Zeep put aside their differences and create a way to get back to Zeep's world. When they get back however, Zeep attempts to kill Rick and Morty, Rick destroys Zeep's miniverse, and after a brawl Rick ultimately defeats him. Rick and Morty safely return to their universe, while Zeep realises he must stop his experimentation with miniverse technology and return to gooble boxes, or else Rick will throw away the battery and destroy his world.

Back in the parking lot, Rick's car uses extreme defensive tactics, including dicing up a person, paralysation and psychological torture, to keep Summer safe from various assailants. While a horrified Summer attempts to stop the car from hurting anyone, an escalating standoff ensues between the parked car and the police and military. Upon Summer's continued demand, the car forgoes physical and psychological violence and instead escapes the situation by engineering a peace treaty between the planet's two warring factions, humans and telepathic giant spiders, in return for guaranteed safety.

In a post credits scene, Rick, Morty, and Summer goes to a ice cream shop on the same planet. Rick complains that his ice cream is full of flies, to which the waitress responds that as a result of the treaty ice cream is now for everyone, no matter how many legs. Rick berates Summer.

"The Ricks Must Be Crazy" has received critical acclaim. Joe Matar of Den of Geek gave the episode a 5/5 rating, saying that "This is a fantastic episode that takes Rick and Morty’s established tropes and plays with them in really fun ways."[2] Stacey Taylor of Geek Syndicate gave the episode a 4/5 rating, saying that "The Ricks Must Be Crazy is an almost perfect episode, with the laughs coming thick and fast but serving not to downplay the death, or the dark and disturbing sequences, but more to compliment them."[3] Jesse Schedeen of IGN gave the episode an 8.8 out of 10 rating, saying that "This week's episode didn't quite reach the heights this show is capable of, but it was an all-around entertaining installment."[4] Zack Handlen of The A.V. Club gave the episode an A- rating, noting that "What makes Rick such a fascinating anti-hero is that the more we see of the realities of this show, the less he seems like an “anti-hero” at all."[5]

• "The Ricks Must Be Crazy" at IMDb