Mike takes a trip to the La Brea Tar Pits in Los Angeles to find out about the important work being done in Pit 91. Then Mike travels north, where he learns about rendering and discovers how much of a farm animal can be recycled.

Mike heads to Meridian, California, to find out what it takes to harvest walnuts. Then he spends some time in Tulelake, California, where he learns how to make goose-down pillows and comforters.

Mike journeys to Queen Creek, Arizona, to press olives into oil and then heads to Sacramento, California, to clean dirty diapers.

Mike ventures to Payette, Idaho, to learn how to make high-quality bird food. Then he heads to Yarnell, Arizona, to collect spiders from the desert to milk them for their venom.

Mike heads to MotivePower in Boise, Idaho, to build and restore locomotives for his 200th dirty job.

Mike ventures out to discover what it takes to breed and train sled dogs at the Happy Trails Kennels in Big Lake, Alaska.

Mike heads to Miami to recover and crush abandoned boats. Then he ventures to San Francisco to pick up and recycle used mattresses.

Mike travels to Hawaii and joins the crew of World Wide Window Cleaning where he harnesses up and hops into a bosun's chair to clean windows 40-stories above Honolulu. Then he shows some never-before-seen footage of the cramped quarters at an aquarium.

Mike treks to a creek in Arkansas to perform tests on endangered alligator snapping turtles. Then, he travels to San Francisco where he removes and recycles toilets.

Mike heads to a unique dairy farm in Ramona, California, where he learns how to milk, care for and breed dromedary camels.

Mike heads to California to spend a day at an electronic waste recycling facility. Then he travels to Honolulu to learn what it takes to make tofu.

Mike goes to Jonesboro, Arkansas, to perform dung beetle research. Then he heads to Williamstown, West Virginia, to try his hand at making glass art.

Mike journeys to Wenatchee, Washington, to help maintain a hydroelectric dam. Then he explores a fish bypass system where he catches and tags fish and winds up wading through a pool of fish poop.

Mike goes to Kentucky to try his hand at shrink-wrapping a houseboat. Then he heads off to Palmer, Alaska, to spend a day working at a reindeer farm.

Mike goes to Hawaii to learn how to make dirt shirts at The Original Dirt Shirt Company. Then he heads off to Reno, Ohio, to learn how to make marbles.

Mike travels to Addison, Pennsylvania, to learn what it takes to be a specialty fireworks technician. Then he heads off to Arkansas State University to check out a cow with a hole in its stomach.

Mike heads to Florida to harvest clams in the Alligator Harbor Aquatic Preserve and then takes on the task of worm grunting in the Apalachicola National Forest.

Mike’s adventure begins in San Francisco where he participates in the messy process of paint bulking. Then, he travels to Wagner’s Sugar Camp in Pennsylvania to spend the day learning to make the most delicious maple syrup the old-fashioned way.

Mike heads to Southern California to work as an Animal Control Specialist by removing stinky skunks and other wildlife that live underneath and around peoples' homes. Then Mike responds to a fan letter about the reindeer farm.

Mike spends a day working on a cricket farm to help breed, capture and package the critters. Then he offers never-before-seen footage of his visit to the Oasis Camel Dairy and his job as a camel rancher.

Mike spends the day working with the Chicken Busters to chase feral chickens and chicks to get them off the streets of Miami. Then he answers a fan letter which asks him about the familial bond often rooted within the various jobs that he works on.

Mike heads to Sault Saint Marie, Michigan, to work with the Soo Locks maintenance crew. The lock system allows vessels to travel from Lake Superior to Lake Huron.

Mike travels to Moss Landing, California, to get messy by making decorative concrete countertops and a fire pit. Then he recounts the scariest job he has ever done in his Dirty Jobs career.

Mike travels to Michigan where he gets downright filthy working at a bone black plant. Then he meets with twin sisters who are big fans of the show to discuss the top five dirtiest jobs Mike has ever done.

Mike takes a look back at his previous jobs, toughest co-workers and his ongoing encounters with dirt and poo. He also entertains with a look at some of the more memorable and unexpected moments in Dirty Jobs history.