I'd like my coffee dark from the Medieval period, please.  Let's back up...a coffee cup discovered by viewers on "Game of Thrones" has caused quite the stir (if you'll pardon the pun)...

Eagle-eyed viewers Sunday spotted a takeout coffee cup on the table during a celebration in which the actors drank from goblets and horns. Daenerys and Jon did not react to the out of place cup.

It's not clear where the coffee cup came from. But some viewers responding on Twitter inferred it was from Starbucks.

How could a show of this magnitude have such a gaffe?

HBO eventually came clean about the caffeinated caper...Deadline got the scoop, along with a picture.

(WIVB-TV)