TV Guide National Geographic Channel Saturday

Archaeologists on the land and sea reveal secrets of the infamous siege of the Alamo near modern-day San Antonio.

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

From Patagonia to Canada, paleontologists uncover the real Jurassic Americas.

Draining Alaska's extreme north reveals the graveyard of a tragic fleet.

Shown is what real life was like in the Wild West, and who was left out of the story.

Hollywood's surprising hidden history lies buried beneath the sea and sand.

A methamphetamine addict and an alcoholic are each given a chance to climb out of their downward spirals, but they may not be able to escape their troubles.

A father has been using since he was a teenager, and doctors attempt to convince him that he must give up crack and heroin by showing him the harm he has done.

A former basketball star and 'A' student has taken to smoking as much as two grams of heroin a day, and doctors try to show him what the drug is doing to him.

Two DEA agents join a team that is working on a major cocaine bust in Bogota, Colombia's El Dorado airport as they risk their lives to take down the cartels.

The DEA's specialized team of submarine hunters goes to Cartagena, Colombia, to intercept a cocaine-carrying sub before it can get to open water.

The DEA investigates a ring of American servicemen that is smuggling cocaine out of Colombia; a citizen is caught with cocaine pellets in his stomach.

A special force of DEA agents patrols the central Caribbean, looking for cocaine transporters who use 100-plus-mph boats that no one else can catch.

Toronto Airport security teams are on high alert as unwanted intruders infiltrate restricted areas across the airfield and inside the terminal.

A massive storm hits Toronto International Airport. Crews race to clear snow and move a jack-knifed Boeing 787 causing chaos at the departure gates.

Emergency at Toronto International as a plane crash lands; the resulting shut down sees flights cancelled and diverted, pushing teams to their limit.

A runway emergency, missing cargo, faulty brakes and wildlife on the runway, the fight to keep flights moving never stops.

Frozen planes, an injured flight attendant and a drunk trespasser keep the team on their toes as the big freeze hits Toronto International Airport.

Toronto Airport takes preparedness and safety seriously: mechanics, firefighters, and even a trainee bird-scaring dog are put to the test.

An explosives alert in baggage, mice threaten the safety of airfield taxiways and high winds make plane movements difficult at Toronto Airport.

Viewers see what happens to all the lost things at airports, from the weird to the wonderful, including items that are left behind at TSA security checkpoints.

Toronto Airport takes preparedness and safety seriously: mechanics, firefighters, and even a trainee bird-scaring dog are put to the test.

An explosives alert in baggage, mice threaten the safety of airfield taxiways and high winds make plane movements difficult at Toronto Airport.

The U.S. Customs and Border Protection uncovers a mysterious drug from Asia and responds to the COVID-19 crisis.

Police dog K9 units find a carrier hiding fentanyl; Homeland Security Investigations stop a deadly drug.

The U.S. Customs and Border Protection finds large amounts of Fentanyl that are hidden in cars from Mexico.

The U.S. Customs and Border Protection find liquid meth worth millions and the U.S. Department of Homeland Security Investigations busts meth smugglers.