Plots, sex and bloody, bloody murder. Those are just three of the defining on-screen trademarks of the brilliance that is HBO’s Game of Thrones. But a look behind the scenes of the television adaptation of George R.R. Martin’s A Song of Ice and Fire novels is just as fascinating as an hour in front of the television. (And not just because Theon Greyjoy is played by Lily Allen’s brother. What now?)

Below, we explore some fun facts and figures about the world beneath the Seven Kingdoms.

#1 The average episode costs HBO $6 million to make.

Game of Thrones is one of most expensive shows on TV. It costs three times as much to make an episode of GoT as it does to make an episode of The Big Bang Theory. (However, it is still costs $1 million less than it did to make any episode on the final season of Friends).

Some GoT episodes cost even more than $6 million to make. Season 2’s action-packed “Blackwater” skated in with a reported price tag of $8 million.

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