NationalGeographicChanneltrompsintothewildwithblue-collarpioneerswhoshirkedconventional9-to-5careerstomaketheirlivinginthedeeprivers,soggymudflatsandwildbackwoodsofAmerica.FilthyRiches,anewseriespremieringSunday,April20,at10:00p.m.ET/PT,travelsthecountrywithindustriousAmericanswhoprovethey'renotafraidtorolluptheirsleevesandgettheirhandsdirtyinordertomakealiving.(Source:NationalGeographicChannel)