One of the themes is how people perceive reality and how they remember events. Another issue brought up is the idea of innocent until proven guilty, which is also a standard in "Star Trek"'s Federation, but on the planet they are visiting they practice guilty until proven innocent. A trial with this structure is not actually conducted; rather, the "Enterprise"'s captain has authority over whether to hand someone over to a different jurisdiction. Another difference between the law of the Federation and that of the planet they are visiting is the weight of secondhand testimony, or in legalese "hearsay".