Season Four begins with the biggest twist in Top Shot history: two competitors are sent packing immediately after a surprise shoot-off in the opening minutes of the first episode. Later, two shooters get a taste of WWII combat as they fire an M1 Carbine from a motorcycle sidecar and attempt to stay in the game. Colby Donaldson returns as host.

Teams grapple with an explosive obstacle course and endure trench warfare conditions while firing the legendary Browning Automatic Rifle. And in a Top Shot first, two competitors duke it out in a fierce battle with a multi-shot grenade launcher.

Top Shot season 2 champion Chris Reed returns to instruct the shooters on several modern shotguns. One team crumbles in the team challenge, leading to a tense nomination discussion. The final challenge is a head-to-head shotgun battle that sends one contestant packing.

As the field of marksmen narrows, one team holds an urgent meeting in an attempt to reconcile their differences. The team challenge features an ultra-modern, high-power crossbow that fires bolts at a stunning 350 feet per second. In the aftermath of a nail-biting archery duel, the elimination challenge is a fight to the finish with what many consider the "Perfect Pistol."

Teams employ pirate tactics in a challenge; a high energy battle that requires coordination and focus; two marksmen use one of the most durable pistols on the planet.

A mighty 3.2 inch bag gun cannon forces each team to work together; a heated grudge match pits two shooters against each other using the fast-flying prehistoric atlatl throwing dart.

Contestants take aim at bowling pins, bottle openers and other specialty targets in an episode full of dazzling trick shots. One team's quarreling over strategy translates to a poor performance at the team challenge. And after a controversial nomination range, two shooters must go head to head to avoid elimination.

Top Shot season one winner Iain Harrison returns to school the competitors in British weaponry. The team challenge introduces a surprising twist, and one team bands together to conquer the task. For the losing team, it's off to the elimination round where two shooters compete in a high-stress precision challenge.

Shooters reach the individual stage of the competition and immediately face an incredible challenge with the Accuracy International AWM Sniper Rifle--taking the longest shot in Top Shot history. Top Shot veterans Kelly Bachand and George Reinas return and get in on the action.

The competition features two challenges inspired by real life SWAT team scenarios. A physically demanding individual challenge leaves three shooters exposed for nomination. And, in an extreme elimination showdown, competitors race the clock as they breach doors with the Mossberg 500 Chainsaw Shotgun to take out targets with the FN FS2000 assault rifle.

Armed with a belt fed Browning 1919 machine gun mounted on an authentic World War II half track, shooters blast their way through an explosive individual challenge. After coming up short, two competitors are selected to compete for the right to stay in the game. An unconventional elimination challenge tests marksmanship, strength and memorization. Only one will have what it takes to land the last spot in the final four.

From the Kentucky Flintlock Pistol to Crossbows and Grenade launchers--an epic assortment of weapons are featured. Four marksmen gear up to blast their way through the home stretch with hopes of becoming History's next Top Shot. After a series of elimination challenges, only two competitors enter the final showdown which comes down to the very last second.