Episode #1.7, "Nothing to Hide"

[Hero]

From (surprise!) nbcumv:

HEROES --(9:00PM-10:00PM) --(TV-14)
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"Nothing To Hide"
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THE "HEROES" EACH CONFRONT UNEXPECTED NEWS AND EVENTS THAT COULD FURTHER CHANGE THEIR LIVES AND RELATIONSHIPS -- Facing a crisis involving her son Micah (Noah Gray-Cabey), a distraught Niki (Ali Larter) reveals her recent personal struggles to a friend. Pushing aside his own issues at home, Matt (Greg Grunberg) assists Audrey's (guest star Clea Duvall) investigation into another bizarre murder, but their pursuit of mysterious serial killer Sylar takes an unexpected turn. After failing to act like a "superhero" when faced with danger, Hiro (Masi Oka) questions his heroism. Nathan (Adrian Pasdar) and his wife Heidi (guest star Rena Sofer) strategize how to win the congressional election. Claire (Hayden Panettiere) is shocked to learn where her missing tape wound up. Meanwhile, her father H.R.G. ("Horn-Rimmed Glasses," guest star Jack Coleman) is disturbed by news from one of his associates. Santiago Cabrera, Tawny Cypress, Sendhil Ramamurthy, Leonard Roberts and Milo Ventimiglia also star, and Randall Bentley ("Judging Amy"), Ashley Crow ("Champs"), Lisa Lackey ("NYPD Blue") and Richard Roundtree ("Shaft") guest star.
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MEDIA CONTACT: David Gardner[/b]

And TVGuide episode detail:

Episode Detail: Nothing to Hide - HEROES
Nathan receives some campaign help from his wife, Heidi (Rena Sofer); a crisis involving Micah prompts Niki to reveal her personal struggles to a friend; Matt finds himself immersed in the investigation of another bizarre murder possibly committed by Sylar; Hiro comes to doubt his own heroism; and Claire discovers the whereabouts of her missing tape. Horn-Rimmed Glasses: Jack Coleman. Audrey Hanson: Clea DuVall. Janice Parkman: Lisa Lackey. Charles Deveaux: Richard Roundtree. [/b]

[Hero]

We finally get to see Nathan's wife! How fun.