Experts investigate the link between extraterrestrials and modern technology; researchers reveal the secret history between U.S. presidents and UFOs.

UFO experts investigate whether the value, reverence and desire for gold is the result of extraterrestrial landings in the ancient past.

UFO experts examine encounters between law enforcement personnel and extraterrestrials; they investigate whether the U.S. government co-opted alien technology for its own space and military programs.

Although alien abduction claims are often dismissed as hoaxes or delusions, there are landmark cases that scholars struggle to refute; Calvin Parker retells his harrowing experience of being abducted near the Pascagoula River in Mississippi.

An exploration into whether breakthroughs such as high-energy lasers, antigravity technology and super-advanced aircraft are the result of human efforts alone or contact with UFOs.

Using archival audio recordings, official transcripts and incident reports, UFO researchers investigate what really happened during encounters between law enforcement personnel and UFOs.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

Investigators reveal the secret history of U.S. presidents and UFOs, from President Franklin D. Roosevelt's knowledge about a UFO battle over Los Angeles to President John F. Kennedy's alleged plan to share extraterrestrial secrets with the Russians.

From the lore and history of ancient Egypt, to the myths of Native Americans, and even the art of the Renaissance period, mankind's past is riddled with the evidence of UFOs.

Few have ever heard about the ultra top-secret military base in the remote deserts of Utah known as Area 52.

Investigating whether deathbed confessions provide real evidence of the existence of UFOs. The truth about alien contact is not limited to the military. In fact, many believe such secrets extend well into outer space on Mars.

Uncovering new evidence pointing to the possibility that ancient man was visited by extraterrestrials; influencing ancient technologies, architecture and art.

When it comes to identifying mysterious, unknown objects in our skies, there are few more qualified than pilots and astronauts. Sightings by these experts are far more common than we're lead to believe.

For decades UFO research has been directed to the skies, but newly declassified documents, along with advances in technology are leading UFO researchers to believe that UFOs may also be inhabiting our oceans.

Evidence reveals the development of secret Nazi weapons not long after an alleged UFO crashed in Germany's Black Forest; UFO experts investigate whether the U.S. government co-opted this technology for its own space and military programs.

Native American myths are steeped in the otherworldly, but new evidence and modern-day UFO sightings have experts rethinking these legends and depictions.

The Royal Air Force has been encountering and even engaging UFOs on a regular basis since World War II, but the British government has continuously denied the sightings; experts investigate why these UFO facts have been concealed.

UFO sightings have been caught on film across the United States, yet the government continues to deny the existence of extraterrestrials; recent news of the Pentagon's secret UFO program may reveal evidence of what the military has known for decades.

Experts examine depictions of extraterrestrials in Native American lore; investigators reveal a possible government cover-up of UFO sightings by the Royal Air Force.

Experts investigate two credible claims of alien abduction; researchers reveal evidence that suggests extraterrestrials may have influenced many sacred sites.

Evidence suggests contact with interstellar travelers in the distant past may have influenced humankind and many of its sacred sites.

Testimony from current and former government officials, pilots and astronauts offers insight into humanity's contact with the extraterrestrial.

The Discovery Channel series "Contact" follows a global investigation to determine whether aliens have made contact with human beings on Earth. Six experts undertake this comprehensive investigation using CIA developed software, special operations investigative techniques and in-depth reporting to track down leads from around the world. The high-powered team of investigators includes former CIA Targeting Officer Myke Cole, conflict analyst Dr. Michael Livingston, astrophysicist Sarah Cruddas, former USMC Special Ops Intel Officer Nick Karnaze, investigative journalist Paul Beban and former Green Beret Intelligence Sgt. Kawa Mawlayee. Taking a radical and far-approach, the investigators bring together millions of data points, eyewitness accounts and declassified government reports to begin to find patterns and piece together a puzzle of cosmic proportions.

Going to the grocery store could be worth $20,000 for one chef in each episode of this competition series. Four chefs compete in three elimination challenges testing their culinary skills as they make their way through the store's aisles. Each challenge features a theme -- such as using only items from frozen foods -- and is judged by a rotating list of guest judges who determine which contestant is eliminated. The chef who makes it through all three challenges then has two minutes to go through the aisles collecting items on a shopping list. Each item on the list is worth $2,000 and if the chef gets every item, the $20,000 grand prize is awarded. Popular Food Network personality Guy Fieri hosts the competition.

Being a middle child isn't easy, as tween Harley Diaz can tell you. The inventive girl feels the need to come up with creative ways to stand out in her family's crowded home, where she lives with her parents and six siblings, to avoid getting lost in the madness. The series, told from Harley's point of view, tends to find humor in the otherwise mundane happenings of everyday life. The menagerie that is the Diaz children includes self-involved Rachel, basketball-playing Georgie, invincible twins Lewie and "Beast," strong-willed youngster Daphne, and Ethan, Harley's closest ally.

The "Real Housewives" franchise continues to expand across America, with this edition landing in Potomac, Md., a community of rolling hills and gated mansions just up the Potomac River from Washington, D.C. As is standard for the franchise, the reality show follows several well-to-do women who are part of the exclusive society. The featured women include former Miss District of Columbia Pageant winner Ashley Darby, who became a stepmother to a 21-year-old and a 24-year old after getting married at the age of 22; socialite Charrisse Jackson Jordan, who is married to NBA player Eddie Jordan; model Katie Rost, who is ready to give matrimony another shot with her current beau following a short-lived marriage to her college sweetheart; and philanthropist Gizelle Bryant, a single mother of three who is getting ready to launch a makeup line geared toward women of color.

Theresa Caputo lives in the real world, but she spends most of her time with spirits. Caputo is an average mom from Long Island, N.Y., in every way except one: she talks to the dead. This series chronicles the work Theresa does each day as she helps her varied clients find closure and connect with loved ones who have passed. She conducts both private and group readings and deals with skeptics as well as believers. At home, husband Larry and kids Victoria and Larry accept the work she does, although they don't always love it. In the Caputo house, dad and kids think the spirits always come first, but for Theresa there is no escaping her gift.