"The Serpent" is the second episode of the American TV series Da Vinci's Demons. It picked up after the end of first episode with da Vinci performing an autopsy on the body of the hanged man.
Ron Hogan, from Den of Geek, said it is a "good television show, but two episodes in it hasn't emerged from the sketchbook into the realm of reality".
It got 0.503 million viewers in United States.
da Vinci studies anatomy with an executed human cadaver; he searches for a "soul" in the stomach.
da Vinci continues his paintings of Lucrezia Donati for his Medici patron Lorenzo de' Medici.
Riario is the nephew of Pope Sixtus IV. Riaro tortures Nico, da Vinci's assistant.