Leonardo attempts to save the Medicis when he learns of a Pazzi conspiracy to seize power in Florence. Meanwhile, Lucrezia makes a confession and the Turk reveals where the Book of Leaves can be found.moreless
In order to gain entrance to the Vatican, Leonardo must somehow travel through the sewers, underwater. Once inside, he not only encounters the mysterious prisoner, but also comes face to face with Sixtus IV. Meanwhile, back in Florence, Giuliano unmasks the traitor who has been spying for Rome.moreless
Piero and Lorenzo leave to meet the Duke of Urbino, in the hope of securing military assistance against Rome. Meanwhile, Leonardo journeys to Romania in his quest for the Book of Leaves and encounters 'Vlad the Impaler'. Back in Florence, Giuliano's search for the true spy continues.moreless
Piero represents Leonardo when he faces trial for the accusations against him. Meanwhile, Lorenzo tries to impress some prospective royal clients and The Turk returns to Florence.
Leonardo reveals his latest weapon to Rome's army, but is later arrested. Meanwhile, Becchi awaits his punishment after being accused of spying for Rome.
When the Medicis receive the blame for an outbreak of demonic possession at a convent, they task Leonardo to investigate. Meanwhile, Riario challenges a mysterious prisoner.
The spectacular failure of his new musket causes a rift between Leonardo and the House of Medici. Meanwhile, the Pope's nephew arrives in Florence and the search for the elusive the Book of Leaves continues.moreless
In 15th Century Florence, the ruling House of Medici commissions a young Leonardo da Vinci to create both a spectacular display for the Easter celebrations and some innovative war machines. Meanwhile, Leonardo encounters a mysterious Turk.moreless