Mike gets to clean the dirtiest pool in America as well as learning how to recycle dirty hotel soap.

Mike Rowe helps the cat ladies of northern Texas and learns to processes peppers.

Mike Rowe submerges in a murky Florida river to pour concrete jackets around crumbling bridge pilings. While in North Carolina, Mike sucks out a concrete washout pit and sprays sediment as he turns toxic sludge into potable water.

Mike returns to his hometown Baltimore to rectify an OLD mistake and learns the recipe for Maryland's most popular crab seasoning.

Mike Rowe attends a dusty baghouse party to clean the filtration system at a North Carolina asphalt plant; in Colorado, Mike gets his dirtiest yet, pyrolyzing waste lumber into the planet's most efficient fertilizer: biochar.

Mike Rowe travels to Anna, Ill., and wades knee-deep in diarrhea to collect deer urine for America's buck-hunters; Mike strands Maryland's shore to perform a necropsy on an ocean sentinel to determine its cause of death

Mike Rowe descends into the depths of an aging manhole, coating it with a polyurea liner to extend its warranty in Murfreesboro, Tenn.; Mike joins an horologist and a priest to set the time right as he restores a historic clocktower.