I disagree with Matthew's position that the writers introduced too much at the very end to explain what had been happening all along.

While writing the series, the writer introduced a set of "MI5 terminology", terms used by the main characters in the series.

Recently, writers and editors have introduced a radioactive aspect of Captain Atom's physical makeup.

Green kryptonite is the most commonly seen form, but writers introduced other forms over the years, such as red, gold, blue, and black, each with its own effect.

The writers introduce Leanne's mother by releasing her from jail to which the insider said will be a shock to viewers.

"Anasazi" was the first episode of a three-parter where the writers introduced the government conspiracy arc following the Syndicate.

The writers created and introduced the five strong Hancock family.

Then, the writer widens the view of the reader and eventually introduces the overview of the fictional world.

Australian writers introduced the character of the Australian continent to world literature over the period.

The writers originally introduced the numbers solely to engineer a meeting between two characters, Hurley and Rousseau, not because they had a plan for them.