S13, E2: Sam and Dean begin to explore what Jack is capable of doing with his powers. An unexpected visit from Donatello (guest star KEITH SZARABAJKA) alerts the boys to the fact that Jack will need more protection than the Winchesters can provide. Meanwhile, there is a new Prince of Hell in town, Asmodeus (guest star JEFFREY VINCENT PARISE), and with Lucifer out of the picture, he sets his sights set on Jack.