Trial by Fire

The Howe brothers' crew builds an all-terrain wheelchair for a veteran.

The Howes take on building and testing a prop vehicle for a major motion picture. Meanwhile the crew moves forward on the Riptide amphibious vehicle, including a dangerous test of its escape hatch system underwater.

Time is ticking on the Riptide project. The Howe & Howe team bears down, but their first test with the Riptide is disasterous. But it's not all bad news. Mike's seemingly tangent project -- a turret for the Riptide -- is an explosive success.

It’s the 11th hour for the Howe & Howe team, one week before they present the amphibious Riptide to the Army. With a key member in the hospital, the team will have to scramble more than ever to fix what caused catastrophic engine failure.

Matt Wright prepares to begin his Africa XL challenge…. all alone. Will he find redemption after failing to complete 40 days in the Amazon and become savage?

Matt Wright begins his solo XL challenge in South Africa and must find a food source fast. Plenty of wild animals roam the Selati Basin but it's going to take every ounce of skill for this hunter to take dinner home.

Bombarded by horrific storms, Matt Wright and his shelter can no longer handle the beating rain. Only one choice remains: move on in search of a sturdier home or be sent home early.

Matt discovers a new camp, giving him hope another tribe could be close by. Meanwhile, who knew impala hide could make such fashionable and protective gear?

Reaching a breaking point, Matt reads a letter from his wife that was hidden inside a knife handle. Overcome with emotion Matt is unsure he can continue the journey.

Even the greatest survivalists in the world are vulnerable to the crippling effects of isolation. Unwilling to give up and more determined than ever, Matt sets out to hunt down the other survivalists.

Matt wakes up to find his camp burning down around him. A fire forces Matt to face the grim reality of having almost been killed. It's his last chance to find XL tribe for his own safety and sanity.

For an unprecedented 60-day survival challenge, Naked and Afraid survivalists Laura Zerra and Jeff Zausch, take on a punishing Philippine jungle. To make it all the way, they must be willing to become savage.

After a sleepless night due to painful fire ants, Jeff and Laura must improve their drinking water situation. Another priority will be to secure substantial protein, besides snails, if they want to make it to Day 60.

Jeff and Laura get smacked with a dangerous, destructive typhoon that destroys all their progress and tests their mental strength as elite survivalists.

After losing their shelter and supplies during a typhoon, Jeff and Laura explore the jungle to find more resources, a turning point in their 60-day challenge.

It's Day 21, and Jeff and Laura prepare for the difficult 12-mile journey ahead of them. At the end of the trek awaits a new challenge - to begin a new 40-day XL challenge with 12 strangers.