As Sir John leaves for the Vatican, everything appears to be going to plan. But the secretary of state could never have predicted Cardinal Spalletta's next move.

John Paul III travels to Venice to visit Pius XIII. Meanwhile, a tragedy in Lourdes calls for the presence of the new Pope.

John Paul III meets Sharon Stone, who gives him new ideas. Meanwhile, the connection between the Pope and Sofia deepens.

Priest Leopold Essence tips off Sofia Dubois to her husband's dark secrets which leads her to a shocking discovery. Meanwhile, Pope John Paul III speaks with Cardinal Spalletta about a financial scandal that could crush the Vatican.

Voiello, Guiterrez, Assente, Aguirre and Sofia make a trip to the UK to appeal to the alluring but fragile Sir John Brannox.

With Pope Pius XIII in a coma, Cardinal Voiello makes an unpredictable move during the deadlocked papal conclave.

Having uncovered John Paul III's secrets, Voiello begins his plan to regain power. Meanwhile, Lenny Belardo secretly returns to the Vatican.

Lenny wakes up and seeks to help a wounded family, while a new threat to the Church draws closer.

Pius XIII and John Paul III are forced to confront one another, as terrorists take a priest and six students hostage in Ventotene.