https://www.bleepingcomputer.com/news/technology/how-to-see-the-first-show-you-watched-on-netflix/

If you have ever wanted to see what shows or even the first show you watched on Netflix, you can do so by using the Viewing activity option under your Account settings.

Recently Netflix UK & Ireland tweeted about a method you can use to see the very first show on Netflix. This tweet quickly became popular with users replying about the very first shows they watched on Netflix.