Misdirection - a form of deception in which the attention of an audience is focused on one thing in order to distract its attention from another.
There’s nothing I love more in fiction than a good plot twist, something that forces you to re-evaluate everything that came before it, and makes you see that what you thought was happening was actually something else. From The Mayor of Casterbridge, a book brimming with delicious plot twists, to films such as The Usual Suspects, Fight Club, and Memento, they all have a place in my “all-time-favourites” list because they trigger that shiver down your spine moment when you realise you’ve been duped, but in a good way.
Doctor Who delivered it’s first shiver down the spine moment of the series in The Almost People, as we discover that the Amy we have been watching for the last several weeks is not the “real” Amy, and is in fact made of the Flesh. While I’ve been too busy focusing on River Song, the Little Girl, and the Doctor’s death, I have been quick to ignore Amy, or at least underestimate her importance to the overall plot.