Everyone bands together to try to stop Samuel from taking the lives of thousands. Peter joins forces with his most unexpected ally to save Emma. Meanwhile, H.R.G.’s life hangs in…

H.R.G. hosts an untraditional Thanksgiving dinner. Elsewhere, the Petrelli family gets a surprise guest at their table. Meanwhile, Samuel continues to hold Hiro hostage, as Lydia goes in search for…

Piper & Leo, with help from Coop’s ring, must travel back in time to change the events that lead to the deaths of Piper’s sisters. Meanwhile, Billie uses her power…