If you know the show, rename the file to [Show Name] - S01E24.mkv to help media players find the correct information.
This is a Matroska Multimedia Container, a standard file format used for high-definition video that can hold multiple audio tracks and subtitle streams. Common Identification Issues
If the file is part of the show actually titled 24 (starring Kiefer Sutherland), media servers can get confused between "Episode 24" and the show title "24," often failing to list all episodes correctly. Recommendation To identify the content, you should:
Right-click the file and check "Properties" (Windows) or "Get Info" (Mac) to see if there is a "Title" or "Comments" field.