Catherine urges Mary to go ahead with the impending wedding to Don Carlos, considering his advisers' demand to the crown matrimonial of Scotland a regular request, void given his mental infancy. Don Carlos secretly regains his memory, and seeks his revenge on Mary, but she suspiciously asks Gideon for help, who claims that Don Carlos plans to assassinate his wife to rule Scotland. Mary tricks Don Carlos into confessing his intentions and the wedding is canceled, under threat of informing king Philip. Mary learns that Gideon is being blackmailed by Elizabeth, who holds Gideon's daughter hostage.Pregnant with Robert's child, Elizabeth pressures Robert to divorce Amy to marry her. Amy finds out, is locked in, goes mad and frames Robert for murder by killing herself. Catherine rewards her domestic lover Christophe -and buys his discretion- by admission to the King's Guard. Leith finally gets Claude to make love. Regent Narcisse decides to marry off to a wealthy Duke, so her dowry can be used to pay some of the French crown's debts. While Delphine fears that the heart-robbers killing instinct is inside her, he murders again.
—KGF Vissers