Plot summary
King Henry returns from Rome having failed, and accuses Queen Catherine of adultery with Nostradamus so that he can execute her. Queen Catherine learns about Isobel's infant daughter, but the pagan mark on her foot has disappeared so she is unable to be used as evidence against Bash.
Queen Mary and Bash discover that in the past Queen Catherine had an affair and gave birth to a child before Prince Francis was born. They tell King Henry, who realizes that the father is his friend, Richard Delacroix ( Greg Bryk ), and imprisons him. King Henry also dismisses Queen Catherine's efforts to reveal Bash and Diane as pagans, as he was already in full knowledge of their heritage. Queen Catherine learns that Clarissa is a foundling who was disfigured by Nostradamus's father in his efforts to remove a birthmark on her face; Clarissa is none other than Queen Catherine's secret illegitimate daughter.
Bash tells Queen Mary of his fear she will never reciprocate his love for her but she manages to persuade him otherwise. Queen Catherine attempts a combined murder-suicide with Queen Mary, but Clarissa saves both of them. And Queen Catherine is again imprisoned in the tower awaiting her execution.
Credits
Adapted from Wikipedia contributors, Reign season 1. HTML formatting and reference markers removed.