Season 7, Episode 2

A contributor brings History Detectives a patent with his father's name on it. He is certain that his father worked on the famous Manhattan Project - America's covert effort to be the first to build an atomic weapon during World War II. Was this invention used to build the Atomic Bomb? History Detectives discovers a plan to hide atomic secrets in plain sight.

A man has snapped up an item at an estate auction that looked like a Civil War-era weapon.On closer inspection, and after consulting with other collectors, he decides he has an explosive device meant to guard against grave robbers. Is this a grave alarm? History Detectives unearths tales of body snatching and cadaver dissecting, unusual crimes and the most unlikely suspects.

A woman in Portland, Oregon has a large chunk of what she believes is very old beeswax. Could it have been cargo aboard a Spanish Galleon that wrecked over 300 years ago? And what do those odd markings mean? History Detectives unlocks the clues to decipher where the beeswax came from and which ship may have brought it to the Oregon Coast.