As Mary's upcoming wedding looms, a terrible tragedy pushes Mary and Darnley apart, forcing Mary to enlist in Catherine's help. Elizabeth encounters a traitor to Spain, who petitions her to support an expedition to the New World.

Cast: Adelaide Kane, Megan Follows, Rachel Skarsten, Celina Sinden, Craig Parker, Rose Williams, Ben Geurens, Dan Jeannotte, Jonathan Goad, Spencer Macpherson, Will Kemp, Adam Croasdell, Steve Lund, Ann Pirvu, Andrew Shaver