The eight episode of Heroes Volume 2 is titled “Four Months Ago” and will air Monday November 12, 2007 at 9:00 PM on NBC and on Global Television (Canada).

Heroes Volume 2 Ep. 8 ‘FOUR MONTHS AGO’ NBC (USA) promo:

and here’s the Canadian (Global Television) promo aired at the end of episode 7.
Since the episode was aired in Canada 2 hours earlier than in the US, the promo for episode 8 contains only seen-before scenes

Heroes Episode 2.08 official description:

HEROES 02.08

FOUR MONTHS AGO
11-12-2007 9:00PM

THE CLOCK TURNS BACK FOUR MONTHS AS THIS SEASON’S SECRETS ARE REVEALED — LEONARD ROBERTS (D.L. HAWKINS) RETURNS — When the clock turns back four months for all of the Heroes, Nathan pays a terrible cost for his heroic actions. While Peter survives his detonation over New York City, the Company ‘bags’ him as a threat to the world, eventually leading to violent confrontation with Elle (Kristen Bell) and the Haitian (Jimmy Jean-Louis). D.L. (Leonard Roberts) makes the ultimate sacrifice for Niki (Ali Larter) and Micah (Noah Gray-Cabey). Maya (Dania Ramirez) horrifically manifests her dark powers for the first time, driving her and Alejandro (Shalim Ortiz) to America for help. A mysterious, yet familiar face is introduced. David Anders, Jack Coleman, Dana Davis, Greg Grunberg, James Kyson Lee, Zachary Quinto, Sendhil Ramamurthy also star. Carlon Jeffery, Nichelle Nichols and Stephen Tobolowsky guest star.

Show Cast: Milo Ventimiglia, Ali Larter, Hayden Panettiere, Greg Grunberg, Sendhil Ramamurthy, Masi Oka, Adrian Pasdar, Noah Gray-Cabey, Jack Coleman, James Kyson Lee, Dana Davis, Dania Ramirez, Zachary Quinto, Kristen Bell, David Ander

To view the same videos, hosted on Youtube, click on ‘read more’

NBC

Global