"Volume 3: Villains" makes a two-hour special debut with revelations that will redefine familiar characters and shake the series to its core.

A dozen villains with unimaginable power are unleashed after the Company is attacked -- Sylar vs. Elle (Kristen Bell) -- Angela Petrelli (Cristine Rose) takes control and reveals a jaw-dropping secret.

When four villains lay siege to a bank, Angela (Cristine Rose) sends H.R.G. (Jack Coleman) and her dangerous, new walking weapon in after them.

Tasked to save a world destined for destruction, Peter must embrace a wild, dangerous ability to better prepare for the struggle ahead -- guest stars Malcolm McDowell (Linderman), David Anders (Adam Monroe) and Adair Tishler (Molly) return.

Several heroes stand at major crossroads, facing personal decisions that could redefine who's "good" or "evil" -- Claire attempts to take down her first new villain -- Malcolm McDowell (Linderman), David Anders (Adam Monroe) and Jessalyn Gilsig (Meredith) guest star.

As Hiro (Masi Oka) and others seize upon offers to join rival company Pinehurst Industries, Peter (Milo Ventimiglia) is forever changed by a meeting with its shocking founder -- Claire (Hayden Panettiere) and her mom Sandra (Guest Star Ashley Crow) team up to save Meredith (Jessalyn Gilsig) from Doyle's (David H. Lawrence XVII) twisted grip.

Trapped, terrified and cornered, Nathan (Adrian Pasdar) and Tracy (Ali Larter), Matt (Greg Grunberg) and Peter (Milo Ventimiglia) struggle for their lives against familiar faces. Elle (Guest Star Kristen Bell) makes a shocking return.

To prepare for the confrontation ahead, Hiro (Masi Oka) explores what forces -- and familiar faces -- helped twist Sylar (Zachary Quinto), Flint (Blake Shields), and Arthur Petrelli (Robert Forster) into villains.

Heroes fall as Arthur Petrelli (Guest Star Robert Forster) declares war on wife Angela (Cristine Rose), son Peter (Milo Ventimiglia) and all that stand with them -- Kristen Bell, Brea Grant, Jamie Hector, Blake Shields and Ntare Guma Mbaho Mwine Guest Star.

A powerful eclipse casts a shadow over all of the Heroes that impacts their abilities - Seth Green, Breckin Meyer, Kristen Bell, Brea Grant, Jamie Hector and Blake Shields guest star.

The Heroes continue to discover their true abilities under the influence of the eclipse - George Takei, Seth Green, Breckin Meyer, Kristen Bell, Brea Grant, Jamie Hector and Blake Shields Guest Star.

Heroes band together in an attempt to put a stop to Arthur Petrelli - George Takei, Kristen Bell, Brea Grant, Seth Green, Breckin Meyer, Jamie Hector and Blake Shields Guest Star.

The Heroes find themselves teaming up against one another and the good, or bad, in all of them comes to the surface - Robert Forster, George Takei, Brea Grant, Jessalyn Gilsig, Jamie Hector and Blake Shields Guest Star.

They're coming to get you! Emmy Award-Winner Zeljko Ivanek Guest Stars as "The Hunter" as "Heroes" third season continues with "Volume 4: Fugitives".

Lines are drawn and the hunt is on as our Heroes begin their lives on the run - Emmy Award-winner Zeljko Ivanek, Brea Grant and Dan Byrd Guest Star.

The best laid plans of Nathan Petrelli often go awry - Emmy Award-Winner Zeljko Ivanek, Moira Kelly, Justin Baldoni and Dan Byrd Guest Star.

Head games ensue as Matt extracts the truth from HRG -- Emmy Award Winner Zeljko Ivanek and Brea Grant Guest Star.

The hunt continues as Matt and Peter get closer to exposing the truth -- Emmy Award-Winner Zeljko Ivanek, Justin Baldoni and Dan Byrd Guest Star

Sylar goes back to his roots - John Glover Guest Stars as Sylar's biological father.

The identity of "Rebel" is revealed with chilling consequences - Emmy Award-Winner Zeljko Ivanek, Brea Grant and Swoosie Kurtz Guest Star.

As the game of cat and mouse escalates, Danko finds himself a surprising new ally - Emmy Award-Winner Zeljko Ivanek Guest Stars.

Relationships are tested as Danko takes the operation to a whole new level - Emmy Award-Winner Zeljko Ivanek Guest Stars.

The haunting secrets of Angela Petrelli's past can't stay buried forever.

Sylar (Zachary Quinto) continues his unusual partnership and begins to have an unexpected identity crisis. Hiro (Masi Oka) and Ando (James Kyson Lee) take measures toward bringing down Building 26. Meanwhile, Matt's (Greg Grunberg) new found fatherhood changes his priorities. Elsewhere, Nathan (Adrian Pasdar) sets a plan in motion to right the wrongs of his government operation.

As "Volume 4: Fugitives" comes to a close, the fight to stop Sylar has consequences that will change everything - Emmy Award-Winner Zeljko Ivanek and Michael Dorn Guest Star