While most of the science fiction of ALF was played for comedic value, there were a few references to actual topics in space exploration; for example, ALF uses a radio signal as a beacon in the pilot episode. In the episode "Weird Science", ALF tells Brian, who is building a model of the solar system for his science project, that there are two planets beyond Pluto called "Dave" and "Alvin" (as in David Seville and Alvin from the Alvin and the Chipmunks franchise), which gets Brian in trouble at school. However, after ALF makes a call to an astronomical organization and states that "Dave" is known by the organization, Willie comes to believe that "Dave" could be the planetoid Chiron or "Object Kowal".