Are you having a (no sound, won't open, etc.) with the file?
If you are looking for a "guide" to this specific episode or how to handle the file, here is the essential info: 🔍 Identifying the Content
Since .mkv files are containers, they usually have "soft" subtitles. Use the Subtitles > Sub Track menu in your player to turn them on.
Files with generic names like "prbackup" found on unverified sites can sometimes be mislabeled or carry risks.