4. Game of Thrones – $15 million per episode (final season)
Fun Fact: Peter Dinklage (Tyrion Lannister) has been nominated eight consecutive times (once for each season) for the Outstanding Supporting Actor in a Drama Series at the Emmys. He won for the first, fifth, seventh and eighth season, setting a new record for most wins in the Outstanding Supporting Actor category for the same role.
The "cost" is actually figuring in the actors' salaries. 'Friends' absolutely did not cost $10 mil an episode to make.