Private detectives are professionals of observation, it is their most common task. In this work, three private detectives were asked to observe the shooting of an Austrian detective film production. It involves the MR film production „The detectives“ directed by Michael Riebel. In the process of observing the scenes of a shooting, a screenplay from the perspective of professional detectives originates by writing the observation protocols. One of the detectives was asked to treat the scenes in his description as real occurrences in order to not take account of the shooting and the film set itself (projected text). The other two on the other hand were instructed to pay attention mainly to the film shooting and the associated events (monitors).