TV Guide National Geographic Channel Wednesday

As the students reach the midpoint of their training, they start the iconic dogfighting phase and to pass, they must outmaneuver the enemy to take a kill shot.

Host Bear Grylls and actress Brie Larson travel to a remote island in the Gulf of Panama where they take part in a jungle adventure.

Comic Joel McHale travels to Arizona, where he spends time with Bear Grylls in the state's desert regions and explores slot canyons.

Bear Grylls leads actor Rob Riggle on an adventure through the Vatnajokull Glacier, which is located in the southeastern region of Iceland.

Actor Channing Tatum meets with Bear Grylls in Norway to take part in an adventure in the wilderness that challenges his survival skills.

Radio personality Bobby Bones travels to Norway to embark on an adventure with Bear Grylls in which they traverse through a Norwegian fjord.

When Pride Day brings an extra influx of passengers, the pressure is on and a breakdown and the station renovations add to the stress.

During the Formula 1 Grand Prix, employees try to control both the flow of travelers and goods.

As the Orient Express pulls into the station, the security team is busy dealing with a fare dodger.

A growing dispute between two cartels impacts the escalating drug trade within the city of San Francisco as each group battles for control of the markets.

A 27-year-old dealer has sold drugs for 15 years; the Chicago Police Department's violent crimes unit hunts gang leaders; two heroin users get by.

The number of users of the extra-pure, extra-strong variety of MDMA known as "molly" is skyrocketing as electronic dance music grows in popularity.

A North Philadelphia addict sells clean needles; an HIV-positive user tests heroin for wholesalers; a ridealong with two Philly cops.

Phoenix is under the control of Mexico's powerful, ruthless Sinaloa Cartel; the head of the sheriff's dedicated drug task force talks.

U.S. Customs and Border Protection finds $200,000 worth of weed in some luggage; Homeland Security Investigations disrupts a Colombian counterfeit ring.

HSI uncovers a new street drug during a controlled delivery; CBP finds invasive snails in the mail at JFK and 16 kilos of coke in a bumper in El Paso.

A mother crossing by car with her kids is caught smuggling cocaine in El Paso, Texas; AMO shoots out the engine of a boat loaded with coke in Puerto Rico.

Homeland Security Investigations runs down a drug smuggler in a parking lot; U.S. Customs and Border Protection finds ancient artifacts.

A girl's online romance sets off serious red flags at the airport.

A disturbing discovery at the mail center has Biosecurity on high alert.

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

Homeland Security Investigations arrest a counterfeit passport ring; Customs and Border Protection seizes methamphetamine at a railyard.

A girl's online romance sets off serious red flags at the airport.

A disturbing discovery at the mail center has Biosecurity on high alert.

The Coastguard seizes a boat carrying over three tons of drugs.

New drug trafficking strategies include stashes that are anchored to the seabed and narco-submarines.

Spanish Coastguards fight human trafficking with unexpected results.

Sea, air and land units from the Spanish Coastguards strive to uncover drug trafficking plans.