Every episode dated
Every series has a page per season with every episode listed in order: the title, the day it released and a one-line summary, counted the way the services count them. The long American runs, The Office, Grey's Anatomy, The Rookie, are the ones where the episode marks earn their place, and the long-running shelf gathers them.
Finding a row
Type the series and the episode into the search, "stranger things s4e9", and the results narrow to the series with that dated episode; the season page opens with the row highlighted. New episodes lists the newest rows across every series, newest first, which is where a returning series shows up the day a new season drops.
Marking the place
Each episode row ends in a Reached this episode button. Press it once the episode is over and the row is highlighted the next time the season page opens, while My List prints the saved place beneath the series. A long network run watched across a year on two phones and one television is where this earns its keep, and Export on My List moves the marks between devices.