We need to change the name of the series (https://www.tvmaze.com/shows/62495/imperia-petr-i) from "Империя: Петр I" to "Империя", because the first title reflects only the essence of the first 4 episodes, then other episodes of the cycle were added, I give a link to the website: https://www.kinopoisk.ru/series/4365482/