Twelve hard-working Americans take on navigating a wheelbarrow and testing their brick-laying skills to win the opportunity to choose their teams, on part one of the two-hour series premiere.

The crew takes on three additional challenges: they get down and dirty in their first team competition as they work to complete the missing part of a railroad track; they "punch in" for their initial individual test, and the last two standing face off in a railroad overtime challenge, on part two of the two-hour series premiere.

The crew competes in a series of challenges at a junk yard, where they must take apart a car and retrieve auto parts. Next, the last two standing need all the strength they can spare in an overtime challenge removing tires from the rims.

Tensions run high during the team challenge when one crew has issues with communication while building a large fence on a farm.

It's no day at the beach for teams Savage Crew and Dirty Hands as they compete to fill and seal giant bags of sand.

Teams are challenged mentally and physically when tasked with pushing 24 heavy barrels uphill and arranging them in a specific order at an oil field, and one crew member must conquer a fear of heights to climb a telephone pole.

The two crews each look for an important win in the team competition when tasked with packing a moving van, and competitors look to avoid elimination during the individual competition by collecting and loading trash into a moving garbage truck.

Competitors take on a series of "Five alarm" challenges at a firefighter training facility, where they must clear a 60-foot-long section of brush, save a victim from a simulated disaster zone and extinguish a fire before rappelling down from the top of a four-story building.

Teams "Savage Crew" and "Dirty Hands" compete in the final competition to win the overall team prize.

The final five competitors battle to be crowned the champion of TOUGH AS NAILS and win the $200,000 prize! Plus, the finalists get a much-needed boost when their loved ones cheer them on.

The 12 new contenders who are everyday heroes take on their first job - making concrete - with the first two to complete the individual task named crew bosses who get to select their own crews for the team competitions.

Things get slippery when the 12 everyday heroes punch in for their first individual challenge of transporting 250 pounds of slime eels into a container.

The crew members dig deep in the individual competition as they maneuver a bulldozer through a course in order to avoid "punching out."

Crew members get down on the farm in a series of jobs that require stacking 100 bales of hay, herding sheep and making horseshoes.

Crew members look to score a win in the team competition when they must convert a stadium from a concert venue to a soccer field.

Crew members head into the city where they must complete a detailed paint job and clean the outside windows of a downtown skyscraper.

The Dirty Hands and Savage Crew teams dig deep in order to sow the seeds of victory as they compete to landscape the front yard of a new house during the team competition.

Dirty Hands looks to clench the $60,000 bonus in the team competition by being the first crew to restore a wreck into a working car.

Fan favorites from season one stop by to lead the crew in the final team challenge hanging sheet rock, and in the individual challenge laying shingles.

The final four crew members, Scott, Sarah, Zeus and Swifty, put it all on the line and compete in a series of challenges to be crowned the champion and win the $200,000 prize.

Twelve new contestants arrive and their first challenge is to race to receive cargo dropped from a C-130 plane.

Crew members punch in for their first individual challenge, repairing snow fences on Mt. Baldy, the highest peak in Los Angeles.

Season two crew member "Freight Train" returns to lead the competitors through their individual challenge of delivering boxes.

Crew members visit the U.S. Coast Guard, where it's time to sink or swim in a search and rescue individual challenge.

Savage Crew and Dirty Hands race to the Irwindale Speedway in Los Angeles, where they must work together to be the fastest team to complete a race car pit stop.

The crews must install a crop field irrigation system.

Savage Crew and Dirty Hands take center stage when they must set up a lighting grid at the iconic Los Angeles theater The Wiltern.

Savage Crew and Dirty Hands "pound the pavement" in the team competition where they must reseal a massive parking lot.

Host Phil Keoghan welcomes 12 new crew members to Catalina Island, off the coast of Southern California; competitors must build a concrete retaining wall for their first individual competition.

Part two of a special two hour season four premiere.

Crew members visit a plant nursery where attention to detail is key when building a complex planter box in the individual challenge.

Diesel mechanic Quincey Walker guides the crews through a series of challenges that involve servicing automobiles.

Savage Crew and Dirty Hands get tangled up in the team challenge when they must organize and load a 15,000-pound fishing net onto a boat.

Crew members compete in pairs to shrink wrap a large container, with the last couple to finish facing the overtime challenge where one person will be eliminated from the individual competition.

Season three competitor and carpenter Lamar Hanger returns to guide the crews through a series of construction challenges.

Competitors cut, grind and torch 500 pounds of scrap metal; the first to finish the job earn the privilege of choosing their teammates.

Competitors cut, grind and torch 500 pounds of scrap metal; the first to finish the job earn the privilege of choosing their teammates.

In the individual challenge, crew members are tasked with designing and welding a structure that can withstand the crushing force of 1 ton of weight.

Teams are tasked with completing a muddy motocross track to the exact standards of professional riders.

Season 3 winner Lia Mort returns to guide the crews through a series of challenges at a local apple orchard; teams race to gather as many bushels of apples as quickly as possible.

Working-class Americans are tested for their strength, endurance, agility and mental toughness in challenges that take place in the real world.

The crews take a trip to the quarry where the contestants face the most explosive individual challenge ever when they must install 20 detonators.

Crew members compete in a series of challenges that give back to the local community

Dirty Hands and Savage Crew compete in the final team competition when they battle it out in a series of head-to-head matches inspired by the trades.

The final three compete in the most challenging gauntlet yet for the title of TOUGH AS NAILS champion and the coveted winner's belt.