Regex TV shows

^(
  (?P<ShowNameA>.*[^ (_.]) # Show name
    [ (_.]+
    ( # Year with possible Season and Episode
      (?P<ShowYearA>\d{4})
      ([ (_.]+S(?P<SeasonA>\d{1,2})E(?P<EpisodeA>\d{1,2}))?
    | # Season and Episode only
      (?<!\d{4}[ (_.])
      S(?P<SeasonB>\d{1,2})E(?P<EpisodeB>\d{1,2})
    | # Alternate format for episode
      (?P<EpisodeC>\d{3})
    )
|
  # Show name with no other information
  (?P<ShowNameB>.+)
)