Can plants communicate? Do our actions influence their growth and reproduction? Do our feelings influence them? Researchers discuss their findings and ideas concerning our relationship with plants.

New Hampshire's Mystery Hill and the "Oracle Chamber" - was it built by ancient Phoenicians, who traveled to America thousands of years ago? Native Americans? Aliens? Or is it an elaborate hoax? Scientists and archaeologists discuss their theories.

This episode investigates the Nazca Lines in Peru. The symbols of various birds and insects are only discernible from the air, so how was this possible without an aerial view? Who created them and why? Were they an ancient landing field for aliens?

We examine that expanse of the Atlantic bounded by Miami, the Bahamas, and Puerto Rico. Filled with mysterious fogs and lights, erroneous compass readings, and time warps, ships and planes vanish without a trace, dating from the time of Christopher Columbus.

This episode investigates Bigfoot, called "Sasquatch" by Native Americans. Scientists and cryptozoologists discuss the possibility that this creature may inhabit the thousands of miles of timberland in the American Northwest.

"Killer Bees," originally imported to South America from Africa, moved north into Central America, Mexico, and are expected to enter the United States. This episodes is dated since the bees have now been responsible for the deaths of humans and animals in the U.S.

We investigate earthquakes, the natural phenomenon caused by movements in the earth's crust. The famous Californian San Andreas Fault is covered in detail as well as new methods that are hoped will enable scientists to predict quakes.

In this episode we examine the fates of members of the Carnarvon and Carter expedition that discovered the tomb of King Tutankhamen in 1922. Was a "curse" responsible for several mysterious deaths, including that of Lord Carnarvon himself?

Does life exist or did it ever exist on the Red Planet? Do the changes that have taken place over the eons raise the possibility that the same fate could await Earth? Scientists discuss the past and future exploration of our neighbor in space.

This episode investigates the island that was supposed to have existed "beyond the Pillars of Hercules" (Straits of Gibraltar). Could it have been Santorini, that was blown into oblivion by a volcanic eruption? Scientists discuss underwater archaeology and historians debate the accuracy of Plato's dialog.

We investigate Extrasensory Perception and its possible uses in law enforcement. A psychic discusses her work in several criminal investigations. Also, a detective squad that has been trained in not only ESP but other forms of psychic methods is detailed.

We investigate various methods to communicate with life in outer space. Could we converse on their level or would talking to them be like talking to a garden slug? What language or code do we use? And, have they been trying to reach us?

Does ESP exist and can if be taught and learned? It is a trait that we all used to have, before language took its place? A study at the University of California, Davis is reviewed in detail and both believers and non-believers weigh in on the subject.

In this episode we investigate the items stolen by the Nazis during World War II,to be used in Hitler's new capital in Linz, Austria. We discuss where the items may be hidden, the impact this loss has on our culture, and the chances that some of it will never be found.

After breaking multiple aviation records, Amelia Earhart set her sights on a trip around the world. Tragically, she vanished, with her navigator, Fred Noonan. Or did she? Theories abound that she was really on a spy mission - or that she is alive and well and living under a new identity.

In this episode we investigate Dracula, the fictional character from Bram Stoker's novel. But was there a real Dracula? The life of Vlad "The Impaler", the Romanian Count who lived in Transylvania during the 18th century must have surely been the model for Bram Stoker's Count Dracula.

This episodes explores the Moi of Easter Island. Who built them, why were some left unfinished, and, more mysteriously, why were some of them mutilated and destroyed?

Ghosts: Studies specters and a parapsychologist's theory that they are troubled earthbound souls in need of help.

A visit to a soul research institute for firsthand accounts of people who claim they have died and come back to life.

A hunt for the leviathan which has so far eluded all expeditions to prove that it truly exists.

An evaluation of reports by people who have seen "saucers", and the growing body of evidence that America is regularly being visited by UFOs.

Experience an actual voodoo rite, and meet a priest dedicated to disarming its effects.

Camera crews accompany a Peruvian excavation party in quest of a great Inca city believed lost for 300 years.

The mysteries of Stonehenge, a circular arrangement of prehistoric megaliths and lintels in southwestern England are investigated.