Spoilers

[guaxini]

This episode is very likely to be the one with a return appearance by Kristen Bell as Elle Bishop.
- A masterful character who was killed back in Season 1 will make an appearance in this episode, somehow.

[doctor70094]

10/07 - Summary of spoilers given in the Behind the Eclise Q&A: Episode 3.08 titled "Villains" will show us Sylar's first kill. Source: SpoilerTV

 10/07 - Summary of spoilers revealed by Jack Coleman in a BuddyTV interview: Episode 3.08 [is a] flashback episode which is a prequel to the pilot. Source: SpoilerTV

[doctor70094]

11/02 - Summary of spoilers revealed in Behind the Eclipse Q&A #4 and 5: We will learn more about Arthur's doctor who made a brief appearance in the [graphic novels.] We will learn why Arthur didn't need Adam's power until recently. Source: SpoilerTV

[guaxini]

11/04 - We'll learn how the divide came to pass, and we'll also see how HRG and Elle turned Sylar into the psycho killer we all know and love. Source: Kristin on E!Online

[guaxini]

two promos for episode 8.  second one shows sylar killing someone in front of elle around the time of the episode 6 months ago.  also shows angela pulling a knife on arthur.  (angela found out arthur was trying to kill nathan?)

http://www.heroes-france.com/news_1225165245.htm

4 sneak peaks of episode 8.  1st clip arthur tells linderman to kill nathan.  2nd clip elle talks to sylar and tries to console him (after his first murder?).  3rd clip nathan in the hospital yells at arthur accusing linderman of trying to kill him. 4th clip nathan tells linderman he's going to be in handcuffs.

http://www.youtube.com/watch?v=PLHyUfIepVQ

angela asks arthur if he tried to kill nathan

http://www.youtube.com/watch?v=2gTi-IneEe4