S3, E10: Mary (Adelaide Kane) struggles to resist her feelings for Gideon (Ben Geurens) as she works to align herself politically with potential allies. Elizabeth (Rachel Skarsten) and Greer (Celina Sinden) find themselves in similar heart-wrenching situations with the potential for very different outcomes. Catherine (Megan Follows) and Narcisse (Craig Parker) continue their vicious power struggle over the Regency, while Claude (Rose Williams) finds herself in the fight of her life on her wedding night. Anna Popplewell, Torrance Coombs, Charlie Carrick and Jonathan Keltz also star.