Did Mary manage to trust her brother?
That was addressed on Reign Season 4 Episode 1 when it became clear she would need to find a reason to trust him.
What plan did she put in motion to find out who his loyalties were with?
Meanwhile on this hit CW drama, Elizabeth schemed to sabotage Lord Darnley's relationship with Mary.
Did she succeed in her quest?
Also, how did everyone react to the deaths at the close of Reign Season 3?
Use the video above to watch Reign online to get up to speed with the latest drama for the characters.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.