Nearly everywhere, including imdb, they write the title of episode 1.2 was "Part I",
while episodes 1.4, 1.5 and 1.6 are named "Part IV", "Part V" and "Part VI" respectively.
Only on Wikipedia, they write it was "Part II".
Does anyone know more about it? Maybe it has something to do whith the content?
Or did they make a mistake?