Mike Rowe gets dirty as he works with surfboard shaper Matt Barker. Mike masters the art of shaping a surfboard from Styrofoam. And Mike goes underground into a greasy pit of sludge as he joins an environmental company that recycles the gunky grime.

Enter Billy the Exterminator as Mike joins exterminators in their war against rats and bugs; shelling crabs after crabbing in the Chesapeake Bay; making horseshoes out of raw steel and trying his hand at shoeing a horse.

Baby chicken sexer, beer brewer, oyster harvester 

Pig farmer, removing chewing gum from sidewalks (New York City), pigeon droppings removal (New York City) 

Sewer inspector, disaster cleanup crew member (basement sewer), demolition worker (office building interior) 

Garbage collector/recycling separator, shark catcher/tagger, car recycling

Golf ball diver, horse breeder, roadkill collector 

Catfish noodler, septic tank technician, worm castings rancher 

Mike enters a bat cave in Texas in search of guano (bat excrement) to collect with a bat biologist. Later he helps to rehabilitate bats at a "bat hospital." Mike then goes in search of mud used to give grip to baseballs in the major leagues. Finally, Mike tries his hand at filleting fish and takes part in the many stages of seafood production.