Doing as they do, the Sweetgrass guys navigate the Amazonian wilderness for their 7th episode of On The Road, with the help of two locals designated trustworthy entirely on their resemblance to Gilligan and Skipper. As always, powerful narration gives way to bizarre exploits-a busted boat propeller macgyvered with a bent fork, eating large rodents that apparently look like Enrique Iglesias-while their ultimate goal of traveling from source to summit becomes more and more difficult with every cotton stuffed ear drum and rained-out river trip.