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episode title: Chapter Fifteen Pass/Fail

Air date: 2010-01-18

episode lenght: 42 minutes

Hiros life hangs in the balance as his brain tumor worsens, prompting him to subconsciously deal with some of his past decisions. Meanwhile, Sylar pays Claire an unexpected visit to get answers as to why he isnt quite himself. Elsewhere, Samuels plan to impress his long-lost love, Vanessa, takes a terrifying turn.::NBC Publicity (source imdb)

IMDB rating: 6.8

This exact episode (4/15): imdb number tt1510008

Jack Coleman => imdb link: nm0171059
Robert Knepper => imdb link: nm0460694
James Kyson => imdb link: nm1645304
Masi Oka => imdb link: nm1199811
Hayden Panettiere => imdb link: nm0659363
Zachary Quinto => imdb link: nm0704270
Sendhil Ramamurthy => imdb link: nm0707983
Madeline Zima => imdb link: nm0956526
Dawn Olivieri => imdb link: nm1685408
Elizabeth Lackey => imdb link: nm0480118
Kate Vernon => imdb link: nm0894690
Tamlyn Tomita => imdb link: nm0000674
Danielle Savre => imdb link: nm1642290
Sasha Pieterse => imdb link: nm1199888
David Anders => imdb link: nm1044403
George Takei => imdb link: nm0001786
Jordan Dang => imdb link: nm2037637
Satomi Okuno => imdb link: nm2550192
Sally Champlin => imdb link: nm0150744
Shevaun Kastl => imdb link: nm2440777
Mary Wickliffe => imdb link: nm0926934
Helen Eigenberg => imdb link: nm1052414
Reed Baron => imdb link: nm3241190
Quin Baron => imdb link: nm3241223
Robb Conner => imdb link: nm1958484
Megan George => imdb link: nm4487218
Keisuke Hoashi => imdb link: nm0387521
Robert Rueda => imdb link: nm4354659
Chester A. Sims II => imdb link: nm1692979
Utvick Melanie => imdb link: nm2991712

Most of the info found on this page was found on imdb