Context : The A.V. Club gave the episode an A, writing ``But ''Fifteen Million Merits`` is a grander work in every way to ''The National Anthem``, a dazzling piece of science fiction that builds its world out slowly but perfectly over the course of an hour--and packs an emotional wallop along with the ''15 minutes into the future`` warning you already expect. 
Subject : Fifteen Million Merits 
Relation : series
Which series was Fifteen Million Merits in?