第 1 季 共 13 集
播出时间：2012年9月11日
第 1 集 Isabel, la reina
播出时间：2012年9月11日
When Queen Juana is finally pregnant after 7 years of marriage, King Enrique IV orders that his half-siblings Isabel and Alfonso be brought from their home in Arevalo to the decadent Royal Court of Castile in Segovia.
第 2 集 Campanas de boda
播出时间：2012年9月18日
Lead by Marquis Juan Pacheco and Archbishop Carrillo, several nobles rebel against the King under trumped-up charges. Enrique's supporters extort him to act, but he is unwilling to display violence.
第 3 集 La negociación
播出时间：2012年9月25日
Beatriz is shocked to learn that her father has given her hand in marriage without even consulting her. Meanwhile, the King decides to use another wedding to end the country's civil war: Isabel's.
第 4 集 Tragedia en la corte
播出时间：2012年10月2日
The civil war in Castile comes to its most decisive point as the armies of Enrique and Alfonso face each other in Olmedo. In Segovia, the Queen prays for her husband and Isabel for her younger brother.
第 5 集 El pacto de Guisando
播出时间：2012年10月9日
After their recent loss, Carrillo advices Isabel to continue the war and Chacón to seek peace. Enrique finds betrayal in a place he didn't expect. Chacón worries as Gonzalo and Isabel compare their feelings for each other.
第 6 集 La figura del rey
播出时间：2012年10月16日
Isabel and Enrique debate peace terms at Guisando. King Juan II of Aragon, seeking Castilian support against France, sends his emissary Peralta to negotiate the marriage of his heir Fernando - to Juan Pacheco's daughter.
第 7 集 La reina muerta
播出时间：2012年10月23日
Isabel debates her marriage options. Her supporters want her to marry Fernando, and Enrique, the King of France's brother. Pacheco and the King count as an advantage that the devout princess won't lie to them.
第 8 集 ¿Nueva guerra?
播出时间：2012年10月30日
Fernando travels under disguise to meet Isabel in Valladolid, keeping an eye out for bandits and Pacheco's men. Isabel grows afraid as the time to sleep in the wedding bed comes near. Gonzalo can't hide his jealousy.
第 9 集 Boda Real
播出时间：2012年11月6日
Isabel and Fernando marry in Valladolid with the support of several nobles and are acclaimed by the people. However they are cousins and the marriage needs a Papal bull to be valid.
第 10 集 Nacimiento
播出时间：2012年11月13日
Hearing good news from Rome, Enrique makes his new move by blockading Valladolid. With no food for the winter, the people's support for Isabel and Fernando vanishes. Fernando also grows sick of Carrillo's meddling.
第 11 集 El principio del fin
播出时间：2012年11月20日
Isabel and Fernando find refuge in Medina de Rioseco but their situation is dire. Pacheco's army is on the move, ready to punish their supporters. Fernando suspects of Carrillo, while news of her husband's infidelity drive Isabel mad.
第 12 集 Elecciones
播出时间：2012年11月27日
King Juan convinces the new Pope to sign the bull authorizing Isabel and Fernando's marriage. Rome's envoy, Cardinal Borgia, also must propose a new Castilian cardinal - a position that Carrillo and Pedro Mendoza strive for.
第 13 集 La nueva reina de Castilla
播出时间：2012年12月4日
Cabrera convinces the King to receive Isabel and Fernando in Segovia. Away from the Court, Pacheco offers Queen Juana his support while he plots to kidnap Isabel and her daughter.
