Reign

Queen Mary struggles to retain her power as Queen Elizabeth tries to sabotage her -- with help from her new ally, Queen Catherine.

When Catherine returns to France, she is imprisoned; Mary makes tough decisions about securing Scotland's future; Lola feels conflicted.

When King Antoine makes an unexpected return, Mary and Francis turn to an unlikely ally to help hide Francis' condition and secure his family's future.

When Mary receives word from her mother of the dire situation in Scotland, she turns to Francis for help; Catherine fights to become the regent to Charles; Elizabeth faces pressure to wed.

Mary considers staying in France permanently, giving up her claim to the English throne; Nostradamus returns and has a vision about Francis' fate.

Mary must help Catherine, even if it puts the alliance with Scotland at risk; Elizabeth struggles at the thought of losing Dudley.