H.R.G. exposes Samuel's biggest weakness in an attempt to take him down; Ando and Hiro try to save Dr. Suresh.

As Claire becomes immersed in the world of the carnival, she becomes increasingly suspicious of Samuel's motives; Hiro... Full summary

Unexpected visitors greet H.R.G.; Samuel's plan starts to come to fruition; struggling to accept the truth, Peter... Full summary

H.R.G. hosts an unconventional Thanksgiving dinner; the Petrelli family receives a surprise guest; Lydia searches for... Full summary

Samuel discovers how powerful he can become; Tracy starts to lose control of her ability; Matt and Sylar's battle... Full summary

Claire is determined to get to the bottom of the attacks; H.R.G. realizes he may be the source of Claire's troubles;... Full summary

When Hiro travels three years into the past, he gets a second chance to save Charlie from Sylar; H.R.G.'s past with... Full summary

Sylar continues to torment Matt; H.R.G. asks Tracy for a favor; Gretchen and Claire are hazed by their new sorority... Full summary

Sylar starts on a path to rediscover his true identity; Hiro shows Emma the possibilities that go with having an... Full summary

Samuel gets ready for new additions to his family; Claire thinks her roommate might have a hidden agenda; Peter finds... Full summary