Okay, time to take the gloves off! This stealth inclusion of plex’s discover function within the cast credits is very sneaky. We had a way to fully disable discover but no more. Furthermore, the main reason I personally never wanted discover was that I do not want my family shared plex account being exposed to anything beyond MY hosted server.
Today, within a few clicks I can be taken to what I consider inappropriate content. Example, I have the certified 15a movie The Infiltrator (2016) — The Movie Database (TMDB) on my plex server. Now, when I select the cast member Elena Anaya who is in that movie and then scroll down to their Known For list I get these among other things …

Selecting either of these will give you an extra’s section where you can play the trailer for the movie. Not good !
Those who voted for [Implemented] Fully Disable Discover & search results from Streaming Services (More Ways To Watch) do not want discover, even if we are given a carrot of a new cast search system.
Again, I have discover FULLY disabled and I also have extra’s disabled on my libraries. This is my curated server and my content. I do not want this. Plex has sneakily placed this front and central within cast profiles. Not happy at all plex, not at all !!!