Story Arcs for season 8 of Doctor Who
Speaking to EW, Moffatt did confirm that “there are over-arching plotlines, but at the same time 90 percent of every episode is a stand-alone adventure.”
As for the setting for each of the episodes, Moffatt said “We’ve got quite a lot of Earth stuff this time. But it’s proper variety, and I think i’ll not tell you what’s going to be on the roller coaster in advance.”
Regarding the two part finale, Moffatt stated that while the Cybermen are indeed in the episode, it’s not strictly about them, and that fans can expect a wild adventure ride of a story.