In *Sherlock Holmes: Terror by Night* (1946), the setting plays a key role in creating suspense and tension throughout the story. Most of the film takes place on a train, which gives the plot a sense of confinement and danger. Being trapped on a moving train with a killer lurking adds to the characters' feeling of unease. The train's dark, narrow compartments hide clues and suspects, keeping the audience on edge and unsure of who the murderer really is.
The story is told mainly from Sherlock Holmes' point of view, which helps build the mystery. Since Holmes is such a smart detective, viewers get to see how he analyzes clues and people step by step. The audience doesn't know everything right away, which keeps them engaged as they follow Holmes' investigation. This POV lets viewers work through the mystery alongside him, making the final reveal more exciting and satisfying when all the pieces fall into place.