Kevin Labar explains the origins of human and animal emotions as well as the origin of human memories.

Eep's father tells the rest of the family a story about the dangers of curiosity and how it can lead the members of the family to die. He advises them to stay in their normal routine and not to think about anything new. While telling the story, he draws and paints on the walls.

Amy briefly explains the roles of the prefrontal cortex, the limbic system, and the amygdala in the context of Penny and Leonard's relationship.