If a fish on your line swims fast enough, will your rod burst into flames? A star drag reel gives Grant, Kari and Tory hope through some surprisingly hot results.

Usually you FILL potholes. But in order put his and Adam's makeshift flat-tire fixes to the test, Jamie Hyneman DIGS some. And builds speed bumps. And dumps water. And ...

Fact: Jamie Hyneman was riding a motorcycle before he had a driver's license. So, yes, Tablecloth Pull was AWESOME for him, especially when he exceeded 100 mph.

Jamie and Adam explain their confusion why, during Crash Landing, the plane simulator kept telling them, "Don't THINK." (It's because that's NOT what the plane was saying.)

Restaurants dispose of 250 million gallons of used cooking oil each year. For entrepreneurs like Donnie Tipton, one man's trash is truly another man's treasure.

Business owner Jim Eberle explains the process of transforming used cooking oil into biodiesel, which can be used as a renewable replacement for diesel fuel.

The Gulf of Maine is changing - with the Atlantic cod population at a historic low, New England fishermen have been forced to sell their boats and consider other lines of work.

Sam Sanfilippo was once part of a booming cod fishing industry in Gloucester, Massachusetts. Today, government regulations put in place to try and maintain cod populations have forced many fishermen out of business.

With many of the world's fish populations dwindling, we need to support sustainable fisheries more than ever. Here are four ways you can help.

With the cod population dwindling in the Gulf of Maine, locals are being encouraged to give other, more sustainable seafood a try.

An F5 tornado is heading straight for the hospital where Shay-la is having her labor induced. She's already had the epidural so there's no stopping the labor now.

A baby mountain goat gets separated from its mother and must battle the raging rapids to be reunited.

In this deleted scene from North America, gray wolves hunt caribou in Labrador, Canada. Their hungry pups are counting on them to make a successful kill.

Go behind the scenes of the fighting mustangs sequence with North America cinematographer Sophie Darlington.

Watch a special sneak peek of the epic seven-part series North America. Discovery.com/NorthAmerica

Olive Ridley sea turtle hatchlings run the gauntlet in Costa Rica. Only 5 out of 100 will make it through their first 8 hours out of the nest.