Greene portrays the mother of Sylar, the character played by actor Zachary Quinto, in the episode, which is titled "The Hard Part" and is described by TVGuide.com as such: "Hiro and Ando are even more determined to save the world after seeing the grim future; Nathan takes steps to win the election. Thompson (Eric Roberts) brings someone new into the organization; and Sylar visit his mom (Ellen Greene)."

"Heroes" airs in the metropolitan area on WNBC Channel 4 from 9-10 PM ET; check local listings.

"Heroes," created by writer Tim Kring, is "an epic drama that chronicles the lives of ordinary people who discover they possess extraordinary abilities." The hour-long program stars Santiago Cabrera, Masi Oka, Tawny Cypress, Hayden Panettiere, Noah Gray-Cabey, Adrian Pasdar, Greg Grunberg, Sendhil Ramamurthy, Ali Larter and Milo Ventimiglia.

Ellen Greene began her career as a nightclub singer, performing in the now closed New York cabaret Reno Sweeney. At age 21, Joseph Papp took her under his wing and cast her in productions of Boom Boom Room and The Threepenny Opera. Greene earned a Tony nomination for her work in the latter, but it was her role as Audrey in both the original stage and film productions of Little Shop of Horrors that brought her national attention. Among her recent theatrical credits are the West Coast staging of Side Man and an all-star reading of Women Behind Bars. Her many screen credits include "The Cooler," "One Fine Day," "Léon," "Fathers & Sons," "Stepping Out," "Pump Up the Volume," "Talk Radio" and "Next Stop, Greenwich Village." Her solo recording is titled "In His Eyes."

For more information visit www.nbc.com.