[s4e16] All It Cost Her Access

: In England, Queen Elizabeth I (Rachel Skarsten) readies herself for war against Spain and the Catholic Church. Despite their rivalry, Elizabeth comes to realize that she and Mary are mirrored souls—two powerful women besieged by men who seek to control or destroy them.

The finale spans decades of historical events condensed into a single hour of television. It begins in Scotland, where Mary is dealing with the aftermath of her son’s kidnapping by her husband, Lord Darnley. [S4E16] All It Cost Her

: Catherine de' Medici (Megan Follows) sees her storyline conclude in a "completely Catherine" fashion, involving a dark deal with a witch and a bizarre ménage-à-trois to protect her power and her mentally fragile son, King Charles. The Execution and The Afterlife All It Cost Her - Reign Wiki : In England, Queen Elizabeth I (Rachel Skarsten)