If you have the whole season, tools like PowerRename (Windows) or Metadatics (Mac) can do this for all files at once.
The original file had a double extension error. Use only .mp4 (or .mkv if that is the actual container). 🛠️ Pro-Tips for Organizing
If you have a subtitle file, rename it exactly the same: The Bear - S01E07 - Review.srt .