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.

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.

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.

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

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.

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

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.

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

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.

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

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.

Explores the history and science behind different inventions.

NASA's task of reaching beyond the bounds of Earth has uncovered disturbing anomalies that have perplexed even the finest scientific minds. Science Channel digs into the space agency's archives to reveal countless mysteries and unusual encounters, discoveries and sightings. Each hourlong episode scrutinizes evidence, explores possible explanations, and considers testimony from NASA insiders, scientists, astronauts and others who have witnessed the strange phenomena. The stories are made all the more unusual since they come from the most credible scientific organization in the world.

Investigations into UFO sightings.

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.

Executive produced by rapper/actor Ice Cube, the classic game show "Hollywood Squares" is revitalized and given a lively new take. Taking part in the classic tic-tac-toe format of the original game are some of hip-hop culture's biggest personalities, who match wits against one another to win cash prizes for members of the studio audience. Concluding each game is a bonus round, during which the winning celebrity and audience member try for a tic-tac-toe to double the total winnings. Celebrities appearing as contestants and squares include Amber Rose, Fat Joe, Mel B, Nelly, Tyga, Master P, Cedric the Entertainer, Bell Biv DeVoe, and Monica, along with stars from various VH1 reality shows. Comic DeRay Davis hosts.

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.