In this study, the effects of a documentary and a biographical film, which was watched in an informal environment, on the prospective science teachers' nature of science (NOS) views were examined. The study conducted according to the mixed research methodology. The data were obtained through the open-ended questionnaire prepared by considering the consensus aspects of the NOS. The participants were shown a documentary-style biographical film about a cross-section of the life of a famous scientist. The findings show that there are changes in the participants' views on some of the consensus aspects of the nature of science. Some of these were in the desired direction, but the retention was weak. Also, some of the changes are in an undesirable direction such as to create a science myth. According to the results, it can be thought that films adapted from the history of science can be used to teach the nature of science. Since films produced for different purposes such as art and entertainment may cause problems in teaching the nature of science, it can be suggested to use such films in a more structured learning environment.