Eurocrime/Poliziotteschi movie from 1981

A group of Greenpeace youths board an oil rig that's about to be sunk, planning to prevent it. Once on board they discover that they are not alone, something on board is making people act very strange... and what relationship do the rigs previous occupants have with the occult?

Yale scholar Matt Carter introduces his wealthy fiancée, Allison, to his family, and initially everything goes smoothly. However, it isn't long before Allison learns that Matt has lied to her about his relatives to mask their failures and dysfunctions. His brother, Tim, flunked out of school and developed a drinking problem, and Matt struggles to keep his own troubling secret from his less than tolerant parents.

The quest of two children, Jules and Julie, in their travels across Eurasia seeking to overthrow the Empress Dowager of China, and consequently, release their fathers from imprisonment.

Zenobia, Queen of Palmira, revolts against Rome and defeats the Roman troops, but she makes a big mistake when she falls in love with enemy officer Marco Valerio.