How you can know case closed filler episodes?

To identify filler episodes in "Case Closed" (also known as "Detective Conan"), you can check episode guides or fan databases that categorize episodes by plot relevance. Filler episodes typically do not contribute to the main storyline and often feature standalone cases. Additionally, websites like MyAnimeList or forums dedicated to the series often highlight which episodes are considered fillers. Watching summaries or reviews can also help clarify which episodes advance the plot and which do not.