Official NBC Description For Heroes #4.16 "Pass/Fail"

Here's the official description of the January 18 episode of Heroes. Be warned, some spoilers may follow.

NOTE: Writer Oliver Grigsby has posted on Twitter that the description is "not accurate." However, this is what was released by the network. Keep in mind, though, that there may be misinformation here and it might not actually be what's in the episode. (Though hopefully that guest list is right!)

THE VERDICT OF AN UNEXPECTED TRIAL COULD MEAN THE END OF HIRO - GEORGE TAKEI, TAMLYN TOMITA, MADELINE ZIMA, DAWN OLIVIERI AND DAVID ANDERS GUEST STAR - Hiro's (Masi Oka) life hangs in the balance as his brain tumor worsens, prompting him to subconsciously deal with some of his past decisions. Meanwhile, Sylar (Zachary Quinto) pays Claire (Hayden Panettiere) an unexpected visit to get answers as to why he isnt quite himself. Elsewhere, Samuel's (Robert Knepper) plan to impress his long-lost love, Vanessa (guest star Kate Vernon), takes a terrifying turn. Posted on HeroSite.net. Jack Coleman, James Kyson Lee and Sendhil Ramamurthy) also star. Lisa Lackey, Danielle Savre, Sally Champlin, Satomi Okuno and Jordan Dang also guest stars.

Read some spoilers!