第 4 季 共 29 集
播出时间：2008年1月9日
第 1 集 Big Animal Vet
播出时间：2008年1月9日
Mike Rowe gets dirty at a famous barbeque joint, joins forces with a big animal veterinarian and finds himself deep in a New Jersey sludge.
第 2 集 Steel Mill Worker
播出时间：2008年1月16日
Mike Rowe gets dirty in St. Louis as he works with a river barge demolition team and then melts down the scrap steel into molten metal.
第 3 集 Cave Biologist
播出时间：2008年1月23日
Mike Rowe works with a cave biologist and then braves the high seas in search of slime eels.
第 4 集 Buoy Cleaner
播出时间：2008年1月30日
Mike Rowe gets dirty in Oregon making shingles and then jumps on a Coast Guard ship to clean dirty buoys.
第 5 集 Cranberry Farmer
播出时间：2008年2月6日
Mike Rowe gets dirty making handmade bricks in South Carolina.<br />
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He then masters the art of cranberry farming in Oregon.
第 6 集 Mud Mineral Excavator
播出时间：2008年2月13日
Mike Rowe gets dirty in Death Valley, CA preparing for a gem and mineral show. He then helps save injured birds from a nearby salt lake. Finally, he gets dirty working at a rice plantation in South Carolina.
第 7 集 Dirty Jobs of the Big Apple
播出时间：2008年4月15日
Mike Rowe rolls up his sleeves and gets dirty with some of the dirtiest jobs in New York City. First Mike climbs to the top of a giant building to build a water tower and then he masters the art of elevator repair.
第 8 集 Floating Fish Factory
播出时间：2008年4月22日
Mike travels to Alaska for an adventure aboard a fish processing ship.
第 9 集 Dairy Cow Midwife
播出时间：2008年4月29日
Inside an Indiana dairy farm, Mike learns how to milk a cow and use a blow torch to clean her udders. Then, Mike gets the inside scoop on how to inseminate a cow. Finally, he gets an up-close look at fatherhood as he helps deliver baby calves.
第 10 集 Aerial Tram Greaser
播出时间：2008年5月6日
Mike heads to the site of a future California neighborhood where he learns that there's more to erosion control than one might think. Then Mike gets a bird's eye view of Palm Springs as he helps maintain and repair the tram 8,500 feet above the city.
第 11 集 Turkey Inseminator
播出时间：2008年5月13日
Making a home energy efficient by improving insulation, turkey artificial insemination, viewer mail, car crusher
第 12 集 Ice Salvage Crew
播出时间：2008年5月20日
Mike gets dirty in Alaska as he helps protect the environment by cleaning up an oil spill. He then travels to Minnesota where he works to pull a car out of a lake that has fallen through the ice.
第 13 集 Wind Farm Technician
播出时间：2008年6月3日
Mike heads to an Oklahoma wind farm and learns that going green sometimes means you've got to get brown first. Then he heads to Kentucky to clean out a sinkhole that some have unfortunately turned into a garbage dump.
第 14 集 Animal Barber
播出时间：2008年6月10日
Mike first visits Terressentials where natural organic hair care products are made out of mud. He then returns to Montana to do some more work with big animal vet Charlene Esch. Finally, Mike joins forces with the yak and bison rancher who put him to work in his 150th Dirty Job.
第 15 集 Brown Before Green
播出时间：2008年6月17日
Mike looks back on several of the Dirty Jobs that help to clean up the environment. From geothermal drilling, to wood and tire salvage, to building cobb homes, one thing seemed constant: in order to be green, you usually have to get brown first.
第 16 集 Tar Rigger
播出时间：2008年10月8日
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.
第 17 集 Dirty Chip Maker
播出时间：2008年10月15日
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.
第 18 集 Sheep Castrator
播出时间：2008年10月22日
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.
第 19 集 Leech Trapper
播出时间：2008年10月29日
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.
第 20 集 Dirty Presidents
播出时间：2008年11月5日
Mike takes a look at what dirty jobs past presidents once performed. This Dirty Jobs Extravaganza will leave us all looking at the country in a new way.
第 21 集 Mannequin Factory
播出时间：2008年11月12日
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.
第 22 集 Egg Farm
播出时间：2008年11月19日
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.
第 23 集 Vellum Maker
播出时间：2008年11月26日
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.
第 24 集 Maggot Farmer
播出时间：2008年12月3日
Mike moves a giant cactus in Arizona and then helps raise maggots on a farm in Idaho.
第 25 集 Gourd Maker
播出时间：2008年12月10日
Mike Rowe cleans out a Connecticut lake and then turns gourds into artwork in Pennsylvania.
第 26 集 Brown Before Green 2
播出时间：2008年12月17日
Mike takes a look back at some of his former coworkers who should be role models for the green movement.
第 27 集 Maggot Farmer
播出时间：2008年12月3日
第 28 集 Gourd Maker
播出时间：2008年12月10日
第 29 集 Brown Before Green 2
播出时间：2008年12月17日
Mike takes a look back at some of his former coworkers who should be role models for the green movement.
