Mercy is the tenth episode of Season Two and 32nd episode of Reign overall.
MARY SEEKS RETRIBUTION — In the aftermath of an attack on the castle, a blood-thirsty Francis makes a startling decision that will forever change his rule as the King of France, causing him to track the missing Narcisse with a newfound lust for revenge. Meanwhile, Mary is stunned to discover the truth behind Francis’ recent decisions and embarks on a treacherous mission of her own with Lord Condé. Leith urgently pleads with Greer to flee the country after violence erupts across the land. Catherine receives an unexpected and erotic visit in her chambers after making a final decision regarding the fate of her daughter Claude. Sebastian, Lola and Kenna also appear.