Terl is a fictional character from the science fiction novel "Battlefield Earth," written by L. Ron Hubbard. He is a member of the alien race known as the Psychlos, who invade Earth and enslave its human population. Terl is portrayed as cunning and ruthless, using his intelligence to manipulate others for his own gain. In the story, Terl's primary goal is to exploit Earth's resources for the benefit of his species. His character embodies themes of greed and power, showcasing the consequences of oppression. The novel explores the struggle of humans to reclaim their planet from the oppressive rule of the Psychlos, with Terl as a central antagonist.