In the Republic of Croatia, the impact of the CSI series on the judicial system (so-called CSI effect) has not been investigated so far. This study aim was to examine the impact of the CSI effect on the operation of the legal system in the Republic of Croatia. We conducted an online survey in a research to which 104 lawyers responded. It turned out to be the following: respondents felt that crime TV series did not influence the way it conducted investigations, their behavior, court decisions, and the way they communicated with the public. They feel that public expectations have changed in part because of crime TV series, but they also think they have not influenced their behavior or the decision, brought by the court. They also believe that crime TV series have partly influenced criminal behavior and they state that such series also partially simplify how the police conduct investigations. Regarding the way of understanding the work of the judicial system, the respondents believe that crime TV series makes it difficult to understand the Croatian legal system and do not accurately depict court proceedings. Respondents stated that crime TV series do not accurately show the availability and value of clues collected at the scene. We can conclude that the general attitude of the respondents is that crime TV series do not influence themselves or the courts, but they believe that such series still leaves a mark on the public which under their influence creates a misperception about the way the legal system works and functions.