Over the course of more than thirty years, the Power Rangers have lived through some truly harrowing times, though none have been as bad as their Darkest Hour is poised to be. With the threat of Dark Specter having breached both the bounds of their reality and the Morphin Grid itself, there is seemingly nowhere left for the Rangers to turn. Thankfully, they have lived through eerily circumstances before, even if many of them have no recollection of the events of Shattered Grid, let alone those that led up to it.
Source：https://www.cbr.com/power-rangers-comics-darkest-hour-shattered-grid-reference/
