An earthquake hits Scotland, and Mary faces claims she isn't coming to the aid of her people. Meanwhile, Elizabeth takes drastic measures after she is discovered with Gideon; and Charles make a decision that backfires.

Cast: Adelaide Kane, Megan Follows, Rachel Skarsten, Craig Parker, Rose Williams, Charlie Carrick, Ben Geurens, Grace Faria, Zachary Amzallag, Clint Butler, Adam Croasdell, Scott Garland, Megan Hutchings, Will Kemp, Violetta Pioro