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

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 Rowe heads to Queen Creek in Arizona to make oil out of olives, and then cleans dirty nappies in Sacramento, California.

Mike Rowe works with a cave biologist and then braves the high seas in search of slime eels.

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 travels to Ohio to check on the Common Tern population and then he finds himself in Northern California plugging an abandoned mineshaft.

Mike heads to Pennsylvania and tries his hand at making bologna and then goes to Alaska to repair a very special toilet.

Mike Rowe cleans out a Connecticut lake and then turns gourds into artwork in Pennsylvania.

Mike travels to Yakama, Washington to harvest hops, the main ingredient in beer. From there Mike goes to the Hudson Valley where he turns animal hides in to paper. 

Mike travels to Yakama, Washington to harvest hops, the main ingredient in beer. From there Mike goes to the Hudson Valley where he turns animal hides in to paper. 

Mike visits a Chicken Farm to see how eggs make it to the store. There, he finds out that 1.4 million chickens equal a lot of poo, which he gets the chance to clean. Later, Mike learns how dirty dirt becomes clean dirt as he sterilizes soil in Oklahoma.

Mike helps break down some homes at the Windsorland Mobile Home Park to make room for a new shopping center. Next, he heads to Patina-V where he learns the art involved in creating a mannequin. 

Mike teams up with the boys from Bartos Bait & Fish to catch leeches that will later be sold for fish bait. Then it's off to the Green Tripe factory in Hollister, CA where Mike helps make BARF (Biologically Appropriate Raw Food) for dogs.

Mike helps saw down a giant concrete wall at an auto dealership in order to make way for a new wash bay. Then he heads to a sheep farm where he tries shearing and castrating a sheep and is treated to a pate of Rocky Mountain Oysters. 

Mike heads to the Dirty Potato Chips factory and learns how potato chips are made and what it takes to keep the machines used to make them clean and in working order. Then it?s off to Rifle, CO where Mike attempts to clean a "monster" hidden underground.

Mike hooks up with the tar rigging crew on the oldest active merchant ship in the world, the Star of India in San Diego. Then, Mike looks back at some of the dirtiest tools he's used, all which make life simpler for the rest of us.