Once I had a working database with episodes and seasons, I created three different sheets that could be used for the dashboards. A pie chart, an episode length sheet, and a season/episode selection sheet to connect the dash board and make it dynamic. I also created a charact sheet that allows you to compare different caracheters in the pie charts depending on what season/episode you choose. This was the first dynamic dashboard I built in Tableau.
While it is very basic, the underlying mechanics of building a dynamic data dashboard were great to learn and implement. If you are interested in looking at the dashboard I will try and upload it later.