On September 21, Heroes returns with its fourth season/fifth volume.

In "Redemption," the main characters attempt to settle into their regular lives, but they'll deal with a difficult question as they do: how do extraordinary people lead ordinary lives?

NBC sent out a press release this week, officially introducing the new season and its myriad of storylines. Below is a summation of the network's preview of "Redemption."

• At college, Claire's roommate commits suicide and Claire discovers her new friend, Gretchen (guest star Madeline Zima), is hiding a secret.
• Hiro discovers that he has a terminal illness. Consequently, he sets out to right the mistakes of his past.
• Peter returns to work as a New York City EMT, but his life changes when a hearing impaired woman (guest star Deanne Bray) enters his life.
• HRG is charged with creating a new Company. He's approached by Mohinder, who warns of a new danger. 
• Tracy Strauss has risen from the dead.
• Nathan discovers new abilities. As Angela is aware, these are signs that Sylar is emerging within her son.
• Parkman tries to raise his son in peace, but he can see and hear Sylar.

Follow all that? Sound off on any of it in our Heroes forum!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.