hey, I have a TV show site in wordpress. Right now it has over 10,000 posts. What i am looking for is a way to show a thumbnail for all of those posts. May be a way where i can upload an image for a category (a season) and all the posts associated with that category automatically takes that thumbnail. Is there a way i can do this in wordpress. Also is there any theme which has a built in functionality like this. All i care about is getting relevant thumbnail for my posts and doing it manually will kill me. Please suggest.