Storylines usually center on Mork's attempts to understand human behavior and American culture as Mindy helps him to adjust to life on Earth. It usually ends up frustrating Mindy, as Mork can only do things according to Orkan customs. For example, lying to someone or not informing them it will rain is considered a practical joke (called "splinking") on Ork. At the end of each episode, Mork reports back to Orson on what he has learned about Earth. These end-of-show summaries allow Mork to humorously comment on social norms.