The 100th and the last episode of the show.
First (and last) episode of the show to have both the writer and director be the same person.
Filming started on March 5th and wrapped on the 15th.
This will be the first episode of Jason Rothenberg as a director.
The episode and series' final moment is a flashback to Clarke drawing on the floor of her cell in "Pilot," The 100's first scene. This effectively brings the show full circle.