The fourth and final season of Reign premiered on The CW on February 10, 2017, and concluded on June 16, 2017. It was announced on March 11, 2016.
The season aired on Friday nights at 9:00 p.m. following The Vampire Diaries in the winter, and The Originals in the spring and early summer.
It arrived on DVD on October 10, 2017.