Warning: This recap of the “The Circle of Life” episode of Survivor contains spoilers. The scheming rat (Richard Hatch, Russell Hantz), the good guy who wins challenges (Terry Dietz, Colby Donaldson), the friendly smooth-talker (Parvati Shallow, Boston Rob). Now, this season, most of the people on the Brains tribe are know-it-alls (that’s kind of why they are on the Brains tribe).