Metropolis Mysteries of Rome

Armed with pioneering technology, archaeologists uncover the secrets of Baiae, an exclusive resort metropolis for the Roman elite that's now buried beneath the sea, and investigate a secret portal to the underworld in the ancient Roman city of Hierapolis. This is a mashup of S08E02 "Rome's Gate to Hell" (Hierapolis) and S05E05 "Pompeii's Evil Twin" (Baiae).