Reign - 4 ª Season

Queen Mary, unsure who to trust, tests her brother James to ensure his loyalty after hearing of his meeting with John Knox. Queen Elizabeth agrees to help Lord Darnley, in an attempt to sabotage the powerful suitor's relationship with Mary.

Mary discovers there is a leak within her inner circle and sets out to uncover the traitor. Queen Catherine goes to extremes to regain some of her lost power, while Queen Elizabeth attempts to use Narcisse to further her quest for supremacy.

Mary must choose between love and country, while Gideon attempts to show her why she should choose love. French court is in chaos as Catherine's daughter Leeza returns home, directing her animosity towards her sister Claude. Catherine struggles to cover for Charles as his behavior becomes increasingly erratic.

When Lord Darnley surprises Mary with a visit in Scotland, Mary sees a glimmer of a union that could be more than just political. Elizabeth fights to gain allies in her favor and Catherine must work to get Claude back on track by finding her a new husband.

In order to get Mary (Adelaide Kane) to agree to a marriage, Lord Darnley (Will Kemp) must demonstrate his loyalty when she voices her concerns about his true intentions. Catherine (Megan Follows) and Narcisse (Craig Parker) work to repair King Charles' (Spencer MacPherson) reputation after rumors spread about his strange behavior and threaten the throne.