How many episodes in 4 season: 14 episodes
Mike Rowe gets dirty in St. Louis, MO as he works with a river barge demolition team. He then learns how to melt down the scrap steel across the river in Illinois.
Mike Rowe works with a cave biologist in Kentucky. He then braves the high seas off the coast of Maine in search of slime eels.
Mike Rowe gets dirty in Oregon making cedar shakes and shingles. Then he jumps on a Coast Guard ship in the San Francisco Bay to clean dirty buoys.
Mike Rowe gets dirty making handmade bricks in South Carolina. He then masters the art of cranberry farming in Oregon.
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.
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.
Inside an Indiana dairy farm, Mike learns how to milk a cow on a machine that looks like a merry-go-round. 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.
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.
In this episode, Mike crawls through rat droppings, falling insulation and debris to make a house more energy efficient. Then, he visits a turkey farm where a bunch of large-breasted birds are inseminated.
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.
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.
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.
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.
