From Rome, Caligula summons Diana from her retreat at the Gallio home, to tell her that Marcellus has become a traitor to Rome by becoming a Christian. He takes her to the guard room where a captured Demetrius is being tortured. Diana runs out of the palace to Marcipor (David Leonard), the Gallio family slave, who is secretly Christian. Diana guesses that he is a Christian and has seen Marcellus, and so she gets Marcipor to take her to see him.