Dizi Adı: Reign
Bölüm Adı: All It Cost Her
Sezon/Bölüm: 4. Sezon 16. Bölüm
Yayın Tarihi: 16 Haz. 2017

In the series finale, Mary changes the course of history with a decision she makes, and her perilous move for survival causes her to have a stunning realization. Meanwhile, Elizabeth steadies herself for war and becomes the instigator in Mary’s demise.