I've been compelled to watch a few of these historical series about royal houses because my wife likes them. Versailles was OK but this is very poorly executed. The costumes are good and the backdrops pretty but these are the only redeeming features as the script is poorly put together and much of the acting as wooden as I've seen for quite some time. You are left with an impression that the Russian state has heavily influenced the production. For instance Peter III is portrayed as an incompetent and immature fantasist when in reality he tried to implement some rather enlightened reforms. I'm frankly amazed its rated 8.2 on IMDb.
Review of Ekaterina
