Reign 2×15 “Forbidden” – Mary’s (Adelaide Kane) mother (guest star Amy Brenneman) returns to advise Mary that her throne is in jeopardy. Mary makes a shocking proposition to Condé (Sean Teale), along with a bold move to reclaim her throne. Francis (Toby Regbo) moves closer to Lola (Anna Popplewell) after a setback with Mary, while King Antoine (guest star Ben Aldridge) makes Kenna (Caitlin Stasey) an interesting offer. Megan Follows, Craig Parker, Rose Williams, Celina Sinden, Torrance Coombs and Jonathan Keltz also star. Charles Binamé directed the episode written by Laurie McCarthy and Nancy Won (#215). Original airdate 2/19/2015.