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Noah gets some unexpected visitors, while Claire arrives at the carnival as Samuel's plans progress. Elsewhere, Peter confronts Sylar and discovers that extreme measures are necessary to stop him.
As Noah hosts a thanksgiving dinner, an unexpected guest visits the Petrelli's. Meanwhile, Lydia tries to discover the truth about one of the carnival's secrets.
As Matt continues his battle to resists Sylar's mental domination, Tracy struggles to control her ability and Samuel learns how to tap into the full power of his.
Claire tries to determine who is responsible for the attacks on Gretchen and Annie. Sylar maintains his control of Matt, and Peter uses his newly gained ability to help Emma.
Hiro makes a deal with Sylar to save the life of his true love Charlie, unaware that he's playing right into Samuel's hands.
Sylar continues to torment Matt. HRG and Tracy help a young boy who is has suffered many hardships in his life. Claire and Gretchen have a problem with their new sorority sisters hazing them.
