Board Thread:Spoilers/@comment-87.147.32.195-20170512173026/@comment-27794543-20170517014102

It was leaked January 31, before the first episode of the season aired. There are many things to suggest that it is authentic, e.g.
 * Uses terms "Praimfaya", "death wave", "Becca's island", and "Becca's lab" which weren't used in earlier seasons.
 * Becca's lab has a rocket.
 * Mentions five years that Earth will be uninhabitable.
 * Mentions drones still working & being controlled.
 * Mentions Jasper's suicide note made out to Monty.
 * Mentions Abby's vision of Clarke covered in lesions.
 * Mentions "tea" - likely reference to the jobi nut tea.

Furthermore, a page from "A Lie Guarded" was also leaked. That episode has since aired and that page has been proved to be authentic.