Crime dramas typically feature three main character types - the detectives or police who solve the crimes (leads, pairs, or ensembles), the criminals who commit the crimes (transient characters), and the victims (also transient). These characters are often represented through stereotypes, with criminals and victims frequently portrayed based on traits like gender, race, and class. The narratives also generally rely on clear binary oppositions between good and evil, heroes and villains, with the detectives opposing the criminals. However, some shows make these distinctions less clear for more complex stories.