Dr. Jan Pol has been a practicing veterinarian for more than half his life. In 1981 he and his wife, Diane, opened a vet business out of their home, and over the years it has grown to service more than 19,000 clients. Set in Central Michigan's farm country, this reality series follows the work done at Pol Veterinary Services. Specializing in large farm animals, Dr. Pol treats horses, pigs, cows, sheep, alpacas, goats, chickens and even an occasional reindeer. The program also features Dr. Brenda Grettenberger, who has worked with Dr. Pol since 1992.

Investigating the world's most clever and savage predators.

When bears, wolves and foxes are your only neighbors, life can be pretty lonely. Add minus-60-degree days and a constant battle for the most basic necessities, and you have the daily challenges of people who live in remote corners of Alaska. This series takes viewers deep into an Alaskan winter to meet tough, resilient residents as they try to stay one step ahead of storms and man-eating beasts to survive the season. The closest neighbor to Sue Aikens is more than 300 miles away. Eric Salitan subsists solely on what he hunts and forages. Chip and Agnes Hailstone catch fish for currency in bartering for supplies, and Andy and Kate Bassich use their pack of sled dogs for transportation. Also highlighted is a time of year not always part of what viewers see in Alaska: spring! Ice is breaking, animals are waking, and residents face new tests before deep cold returns.

Throughout America's coastline shark attacks are on the rise. Many occur in quick succession at new and surprising locations. As vacationers, scientists and locals are all desperate to uncover what is causing the upsurge, National Geographic Channel investigates the attacks to see what is affecting some of nature's most feared fish. The deep-sea saga employs underwater photography, news archives and testimony to deep dive into mysterious and deadly recent shark attacks.

Silicon Valley circa 1990s was a technology breeding ground that attracted visionaries and charlatans alike, spawning some of the world's most influential people and recognizable brands. Set during that time, this six-part limited series follows the turbulent ride of three different companies whose founders were trying to change the world using the emergent technology of the internet. Creator, director and executive producer Matthew Carnahan ("House of Lies") employs a hybrid of scripted storytelling and documentary interviews with the key players whose stories are dramatized in the show. Emmy winner Bradley Whitford ("The West Wing") leads the ensemble cast.

Africa is home to some of the deadliest creatures of all, and in this series, you'll see them.

Put up your dukes -- er, paws -- and prepare to discover epic, bone-shattering clashes between some of the world's deadliest predators. From lions, tigers and bears to meerkats, mongoose and mice, the series features testosterone-induced battles between some of the biggest, baddest and often surprising fighters in the animal kingdom, revealing the extraordinary motivations and strategies that fuel each incredible brawl.

Alaska's deadliest thrive in one of America's last wild frontiers.

When bluefin tuna season ends in Gloucester, Mass., it's just beginning in North Carolina's Outer Banks, a perfect opportunity to pit North vs. South in a pro fisherman contest for the ocean's most lucrative prey. Venturing south are the best crews from Gloucester to take on top local fleets in the treacherous Outer Banks, where the weather is more unpredictable than up north, and the seas can be extremely rough. The Gloucester rod-and-reel vets must master "greensticking" -- trolling artificial squid from a 30-foot fiberglass pole to lure the elusive species to the surface. Top-dollar bluefin can be worth as much as $20,000 each, but a short season and small government catch quota means explosive rivalries surface quickly.

Food Network Canada presents this eye-opening series featuring food factories. Each episode offers a behind-the-scenes view of production lines across the country to find out how some of the most-popular food items are really made. Through the ingredients, techniques and required processes, "Food Factory" reveals how raw ingredients are turned into everyday eats. In what some call a fascinating world, the manufacturing and technology that is being used in factories simplifies how the country gets its food.

In an ancient land a battle for survival plays out like a "Game of Thrones" episode, but the warring clans here are lions, leopards, hyenas and wild dogs. Set in the remote wilderness of Savute, Africa, "Savage Kingdom" is a rare look at rival animal factions fighting for decreasing resources in a parched region. Complete with brutal violence, unexpected deaths, surprising characters, and even romantic interludes, each episode is told from one predator's point of view. The result is a dramatic, character-driven story shot by award-winning Botswanan filmmaker Brad Bestelink. Emmy-nominated actor Charles Dance narrates the miniseries.

"Secrets of the Zoo: Tampa" is back for more wild adventures in the Sunshine State; the stellar team of vets and animal care experts at ZooTampa are devoted to an exotic cast of animals, from African elephants to Florida panthers and Cuban iguanas.

Homeland Security at JFK International Airport deals with daily issues ranging from fraudulent visas to human trafficking.

Exploring the resilient and deadly animals that call Australia home.

The story of capital punishment through the eyes of young people whose lives have been shaped by it.

Suspenseful nature stories begin just before sunset and end just after sunrise; from Costa Rica to Indonesia to the swamps across the United States, creatures of the night battle for survival when the sun goes down.

Dream adventures turn into hellish nightmares for the travelers featured in this series, which recounts through firsthand interviews and re-enactments terror-filled experiences of being arrested in a foreign country, usually for drug smuggling, and how they coped with the resulting lengthy prison terms. Viewers also hear from people directly involved with the arrests, whether it's the undercover agents gathering the evidence against the suspects, or the people making the drug dealing offers.

This series unveils the engineering secrets of various iconic megastructures that went on to spark a technological revolution, ultimately changing warfare forever. The Nazis built some of the biggest and deadliest pieces of military hardware in history. Adolf Hitler hired men like Wernher von Braun, Ferdinand Porsche and Alfred Krupp to build huge terror machines, high-tech superguns and weapons of mass destruction.

This series helps change how people look at World War II thanks to hundreds of hours of video that have been declassified and fully restored in high definition. Soldiers on the front lines, secret operatives, resistance fighters, and private citizens shot the footage, some of which has never been seen, that gives viewers a firsthand look at what went on during times of battle. Episodes detail the battle over Stalingrad that was a key turning point in the war and show Japanese pilots on the morning of Dec., 7, 1941, preparing for the attack on Pearl Harbor.

From the coast of America to exotic beaches around the world, the number of reported shark attacks has increased in the last half century, many of which are occurring in new and surprising places. In these enhanced episodes of "When Sharks Attack," experts investigate the chilling incidents in an effort to determine exactly what is affecting some of nature's most feared fish. The deep-sea saga employs underwater photography, news archives and testimony to deep dive into the mysterious and deadly attacks.

Enhanced episodes of "The Incredible Dr. Pol."