Plot: Get set to explore the coolest swamps in all the virtual world on this episode of ""Portal. "" And wait 'til you meet your tour guides: there's Mercy the Mercenary; legendary TV star The Alligator Tamer; and, yes, the triumphant return of Grooter, the virtual world's most loveable redneck! Plus, The Drifter leads a band of heroes on a Froglok smackdown, an old geezer takes you fishing, and Dave lands an exclusive interview with the dangerous leader of the Slimebathers