Season 4 Episode 16 All it Cost Her… (Series Finale)

Reign Season 4 Episode 16 "All It Cost Her" Extended Promo (Series Finale)

Reign Season 4 Episode 16 "All It Cost Her" Extended Promo (Series Finale)

Here is an extended promo for the series finale of Reign Season 4 Episode 16 "All It Cost Her" airing next week on The CW.

Watch the first promo below! 

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.

Head over to Reign Episode Guide: “All It Cost Her” for the full description and promo of this episode.