Harry Perry

Grissom and Sara investigate the murder of a mental-hospital patient and quickly narrow down the suspects to a handful of other patients and staff members.

When a body turns up in Boston with links to another murder in Los Angeles, Jane and Maura hop on a plane; Angela and Korsak plan a double date with Kiki and Ron.

Sylar starts on a path to rediscover his true identity; Hiro shows Emma the possibilities that go with having an ability; Peter tries to find a healer for Hiro.

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

Everyone bands together to try to stop Samuel from taking the lives of thousands; Peter teams with an unexpected ally to save Emma; H.R.G.'s life hangs in the balance; Hiro comes to grips with decisions he has made.

H.R.G. enacts his plan to take down the carnival; looking to understand his desire to make a human connection, Sylar visits Matt; Peter warns Emma about Samuel's intentions.