Spoilers

[doctor70094]

 03/11 - Summary of spoilers revealed in Behind the Eclipse Q&A #15: Claire will have a conversation with Sylar about her immortality. Source: SpoilerTV

03/11 - Liam Samuels: Late 30's. Caucasian. Highly educated and extremely charismatic, Liam Samuels is Chief of Staff to the President. Think Rahm Emanuel. Aide: Late 20's. Female. African-American. Highly educated staffer to the junior senator from New York. Secret Service Agent: 30 - 45. Must be in great physical shape. Experience handling weapons a plus. Secret Service Agent to the President. Security Guard: 30 - 45. Must be in great physical shape. Experience handling weapons a plus. A Security Guard working a high profile event. Source: SpoilerTV

[serojay]

Title confirmed as "An Invisible Thread"

[Isaac Mendez]

It hsould be so aweome!

IMDB.com credits Micah, Monica and Claude for the episode, so hopefully they will be there!

[serojay]

As "Volume 4: Fugitives" comes to a close, the fight to stop Sylar has consequences that will change everything... - Nathan (Adrian Pasdar) faces off against Sylar (Zachary Quinto) to keep him from meeting the President (guest star Michael Dorn). Sylar has his own plans for his new partner. Meanwhile, Hiro (Masi Oka) learns that there are repercussions to regaining his ability. Elsewhere, Matt (Greg Grunberg) is forced to go to extraordinary lengths to protect his future with his family. Jack Coleman, James Kyson Lee, Hayden Panettiere, Sendhil Ramamurthy, Cristine Rose and Milo Ventimiglia also star.

[Isaac Mendez]

Nathan and Sylar face off......hrm.

I wonder if all of our theories concerning Sylar being the 'FIve Years Gone' president will be truth.

[serojay]

Sylar will propose to Claire.

Also, we will see the return of a character that nobody will suspect. Tim Cring confirms that this character is not Claude.

The intro to season 4 will set up a new female baddy for our Heroes.

[HiroesFan]

I wonder if it's Alice

[noelevz]

I think this is going to be great!

[fugaa]

Probably Maya will come back as a character cuz shes featured allso in many season 3 wallpapers and such

[Deceit]

- We will see more of Matt's darkside
- Hiro and Ando combine their powers in attempt to take down Building 26
- Actor Michael Dorn returns as the President
- Kristin at E! Online is reporting that the main character death is indeed a male character and that apparently the killer "in many ways" will also die, but we won't understand until we watch the episode.
- Tracy will return
- The end of the episode will lead into Volume 5: Redemption and we will meet the new female baddie

NOTE: Claude is NOT returning despite all the rumors and the listing by IMDB

Source

The obvious route would be to have Sylar kill Nathan then lose himself when he shape-shifts. I still think the one downside to that concept is that it's a big commitment by the writers. Once you go down a drastic path like that, you need to be able to stick with it. I don't think fans are going to take kindly to Nathan being murdered, and then having the heroes stop Sylar. Personally, I'm still holding out for a twist. Maybe Sylar kills Noah because he's not "special". After all, Micah got the wheels turning in Sylar's head about protecting his own kind. Then again, being Nathan was supposed to be step one of helping his own kind.

I really hope the new villain is an actual new person. Having it turn out to be Monica or Maya, to me, would be a bit lame. Candice would be pretty awesome though.

[serojay]

I really hope the new villain is an actual new person. Having it turn out to be Monica or Maya, to me, would be a bit lame. Candice would be pretty awesome though.

Agreed!
Candice returning would be amazing!
However, Missy Peregrym left to shoot Reaper which is why we got a new actress in season 2 and it would have most likely been leaked if she was returning. Apart from that, the character is dead 

I think the new villain is most likely someone we have already seen. The spoilers leaked so far state the return of someone we already know and I speculate that this will be the person in question.

The Canadian trailer shows someone with Blue eyes looking through a keyhole and the sound of electricity can be heard.
My bets are on Elle making a return. Remember when reports came out of a female character who was supposed to die and it was a cover-up. I looked back on the episode where she died and I noticed 3 things...

1. Sylar clearly stops partway through the process.
2. We do not actually SEE a dead Elle.
3. Listen VERY closely when he stops. Right after he stops, you can hear Elle moan.

I'm probably wrong but I'm keeping my fingers crossed. Another possibility is that it could be Alice.

[Deceit]

The Canadian trailer shows someone with Blue eyes looking through a keyhole and the sound of electricity can be heard.
My bets are on Elle making a return. Remember when reports came out of a female character who was supposed to die and it was a cover-up. I looked back on the episode where she died and I noticed 3 things...

1. Sylar clearly stops partway through the process.
2. We do not actually SEE a dead Elle.
3. Listen VERY closely when he stops. Right after he stops, you can hear Elle moan.

I'm probably wrong but I'm keeping my fingers crossed. Another possibility is that it could be Alice.

Everyone I've talked to and every site I've visited continues to mention the blue eye (which is in the American promo as well). It's not a blue eye. It's a hazel eye with the flashes of lightning putting a blue tint over it. Honestly, I think it's as simple as Claire watching Sylar use lightning while fighting Nathan and Peter.

[serojay]

I watched the promo on youtube and paused it to take a better look.
It's possible that the eyes might not be blue but how you managed to tell it was Hazel, I don't understand.
It looks nothing like the color Hazel 

[Deceit]

I watched the promo on youtube and paused it to take a better look.
It's possible that the eyes might not be blue but how you managed to tell it was Hazel, I don't understand.
It looks nothing like the color Hazel 

Took a screenshot. Hope this helps. I think it's Claire, but obviously I can't say 100%.

[psych0phreak]

I have hazel eyes and they do look greenish sometimes, but that screenshot definitely doesn't look like blue eyes. I believe elle is dead and gone and won't becoming back, I think the new baddy will be alice. And the whole lightning thing is probably sylar and peter battling, since peter should be getting his powers back this episode. Peter is supposed to get his powers back when he starts trusting people again and I think 1961 showed us him trusting those closest to him a bit more, right?