S3, E16: When Mary (Adelaide Kane) arrives in Scotland, she is stunned by the treacherous world it has become and is forced her to keep her royal identity a secret until she learns who she can trust. When Elizabeth (Rachel Skarsten) jeopardizes her standing with an unbearable new suitor, Lola (Anna Popplewell) steps in to help, which causes the Queen to question Lola's ulterior motives. Meanwhile, Charles (guest star Spencer MacPherson) secretly plots to relinquish Catherine (Megan Follows) of her power. Torrance Coombs, Ben Geurens, Craig Parker, Celina Sinden, Charlie Carrick, Rose Williams and Jonathan Keltz also star.