Hi Johnny,
Your project sounds quite interesting. I’m sure it will be challenging to get everything organized to support your writing. I’ve not written a TV series, so no doubt there are others here with relevant experience who will be happy to offer suggestions.
That said, I do have one suggestion based on my experience writing my novel series. Consider using Aeon Timeline along with Scrivener. Aeon Timeline will help you keep track of all of the elements of your story–events, characters, places, relationships, and so on. It syncs beautifully with Scrivener.
In case it’s helpful, I previously shared an admittedly unpolished video on how I use Scrivener and Aeon Timeline together: Is Scapple usable as a timeline software? - #8 by SCN.