Reign Our Undoing (Season 3, Episode 8)
TV-14
TV Episode | 42 min | Drama

Reign

Our Undoing (Season 3, Episode 8)

TV-14

TV Episode | 42 min | Drama

As Mary and Catherine deal with the aftermath of Prince Don Carlos' accident, Mary realizes that she will have to marry for the good of her country and not follow her heart. When Catherine is accused of poisoning Francis, Lola is shocked ...See moreAs Mary and Catherine deal with the aftermath of Prince Don Carlos' accident, Mary realizes that she will have to marry for the good of her country and not follow her heart. When Catherine is accused of poisoning Francis, Lola is shocked when Mary thinks Narcisse framed Catherine in order to become Regent of France. See less

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Cast	+ Add Cast
21 cast members

Name	Known for
Adelaide Kane Mary Stuart Mary Stuart See fewer	The Purge (I) (2013)
Megan Follows Catherine de' Medici Catherine de' Medici See fewer	Anne of Green Gables (1985)
Rachel Skarsten Elizabeth Tudor (credit only) Elizabeth Tudor (credit only) See fewer	Fifty Shades of Grey (2015)
Torrance Coombs Sebastian 'Bash' de Poitiers Sebastian 'Bash' de Poitiers See fewer	Reign (2013)
Celina Sinden Greer Castleroy Greer Castleroy See fewer	The Outpost (2019)
Anna Popplewell Lola Narcisse Lola Narcisse See fewer	The Chronicles of Narnia: The Lion, the Witch and the Wardrobe (2005)
Jonathan Keltz Leith Bayard (credit only) Leith Bayard (credit only) See fewer	Entourage (2004)
Craig Parker Stéphane Narcisse Stéphane Narcisse See fewer	The Lord of the Rings: The Two Towers (2002)
Rose Williams Claude de Valois Claude de Valois See fewer	Mrs. Harris Goes to Paris (2022)
Charlie Carrick Robert Dudley (credit only) Robert Dudley (credit only) See fewer	Deep Water (2019)
Ben Geurens Gideon Blackburn Gideon Blackburn See fewer	Rebel Moon - Part One: A Child of Fire (2023)
Mark Ghanimé Don Carlos Don Carlos See fewer	The Age of Adaline (2015)
Giles Panton Lord Cunningham Lord Cunningham See fewer	The Man in the High Castle (2015)
Blair Williams Cardinal Morel Cardinal Morel See fewer	American Psycho (2000)
Richard de Klerk Federico de Toledo (as Richard De Klerk) Federico de Toledo (as Richard De Klerk) See fewer	Repeaters (2010)
Gregg Lowe Cedric Cedric See fewer	X-Men: Days of Future Past (2014)
Robert Dodds Court Physician Court Physician See fewer	Kung Fu: The Legend Continues (1993)
Bruno Verdoni Mysterious Man Mysterious Man See fewer	Molly's Game (2017)
Scott McCulloch Footman Footman See fewer	Breach (2007)
Rod Wilson Lord Rutherford Lord Rutherford See fewer	Open Range (2003)
Michael Giel Castle Guard (uncredited) Castle Guard (uncredited) See fewer	What We Do in the Shadows (2019)