TV Guide National Geographic Channel Sunday

Travelers are reunited with lost treasures, including an expensive pair of vintage Air Jordans, sweaty boxing gear and a stuffed animal.

Lost-and-found workers desperately try to find the owner of a fanny pack as it contains much-needed medication and $3,000 in cash.

Customs & Border Protection in JFK International Airport and San Diego Homeland Security Investigations tackle fentanyl crisis on opposite coasts.

Homeland Security Investigations organize money laundering stings; Customs and Border Protection has its largest drug seizure in Los Angeles Airport's history.

HSI helps the Colombian National Police take down an illegal gold-mining ring; CBP finds an almost $1.5 million cartel drug haul at the RGV port in Texas.

U.S. Customs and Border Protection's K9s sniffs out hidden cash; U.S. Department of Homeland Security Investigations intercepts a $2 million drug deal.

Host Dan Snow explores the discovery of Egypt's Valley of the Kings.

Archaeologists investigate ancient Egypt's mightiest pharaoh, Ramses the Great; teams excavate buried tombs and make shocking new discoveries.

Archaeologists investigate the mysterious circumstances surrounding the death of King Tutankhamun to uncover the truth behind his demise.

Archaeologists investigate Egypt's legendary pharaoh Alexander the Great, the teams explore catacombs and temples, searching for his legacy and his tomb.

Archaeologists investigate how the mighty river Nile transformed ancient Egypt into one of the ancient world's greatest civilizations.

Archaeologists investigate Egypt's most famous female pharaoh, Queen Cleopatra, as they excavate ancient graves and search hidden tunnels for her tomb.

Archaeologists study the mysterious pyramids that followed the Giza pyramids, and they unearth new tombs and chambers to uncover the beguiling story.

Archaeologists investigate one of the great mysteries of ancient Egypt: the mummy; teams excavate buried tombs and make shocking new discoveries.

Archaeologists piece together how the pyramids evolved, unearthing exciting new evidence from the spectacular Red Sea coast to the remote desert.

Chef Gordon Ramsay is in Finland in order to unlock the summer secrets of the land of the midnight sun.

Chef Gordon Ramsay attempts to unlock the secrets of America's bountiful Smoky Mountains.

Chef Gordon Ramsay discovers this island's cuisine bouncing back from devastating hurricanes.

Chef Gordon Ramsay digs into the hidden culinary secrets of Michigan's Upper Peninsula.

In the wilds of the Lone Star State, Chef Gordon Ramsay learns the meaning of "Texas Tough."

Chef Gordon Ramsay discovers the bounty of seafood found along Maine's rugged coastline.

One student's dreams of becoming a fighter pilot are put in jeopardy as the class starts advanced phase training with a set of breathtaking bombing tests.

Landing on an aircraft carrier demands precision flying and is a skill vital for all Navy fighter pilots and as the students tackle the most technical section.

A new discovery in the Baltic Sea reveals the story of a lost treasure.

A lost kingdom and an underwater cave reveal secrets about the ancient Maya civilization.

Revealing the drug smuggling routes which make cartels billions of dollars each year.

Secrets of the attack on Pearl Harbor, in Honolulu, Hawaii, are revealed in various wrecks of ships, submarines and planes.