Snowdrop.S01E09.Dual.720p.HEVC.x265-GROUP
Snowdrop - S01E09 - [Episode Title].720p.HEVC.mkv Just replace [Episode Title] with the actual episode name if you know it.
Based on the filename you provided, here is the standard formatting piece (often used for scene releases or renaming tools like FileBot or Sonarr):
Snowdrop.S01E09.720p.HDTV.x264-GROUP
Snowdrop.S01E09.720p.HEVC.x265-GROUP
Snowdrop.S01E09.720p.HEVC.mkv