The CIA's MK-Ultra program sought to create mind control methods through unethical human experimentation, and now, experts investigate classified documents that reveal the horrific atrocities that were carried out in the pursuit of national security.

The Ħal Saflieni Hypogeum, a subterranean Neolithic temple discovered on the island of Malta in 1902, contains the skeletal remains of thousands of humans. Experts use forensic archaeology to investigate elongated skulls that may unlock the secrets of an advanced, lost civilization.