i just checked both firefox and chrome and both show the same for the rookie, like i said it just depends on how you access the show page. If i click on the next rookie episode in my up next list i don’t get the season drop down but when i click on the title for the rookie then i can see the drop down. its the same in both browsers
episode page
series page
implementation could be better for sure, its their first step in getting a vertical ui for us on desktop