Da_vinci_s_demons_1x03_il_prigioniero_ita_eng_d... -

While the church claims the nuns are possessed and attempts violent exorcisms, Leonardo applies logic and forensics to find a rational cause. He eventually identifies the culprit as an ergot infection (a fungus often found on rye) that causes hallucinations and convulsions.

For more details on the cast and plot, you can check the episode's entry on IMDb or the Da Vinci's Demons Wiki . Da Vinci's Demons s01e03: The Prisoner - Dark Matter Zine Da_Vinci_s_Demons_1x03_Il_Prigioniero_ITA_ENG_D...

In Rome, Count Riario meets with a hooded figure held in the Pope’s secret prison. This prisoner teaches Riario strategy through the ancient Chinese game of Go , hinting at deeper conspiracies surrounding the "Book of Leaves". While the church claims the nuns are possessed

Leonardo uses fireflies to track the source of the "possession" in a method similar to modern UV lighting, discovering that a tainted altar was the common link among the victims. Da Vinci's Demons s01e03: The Prisoner - Dark