Heroes will return with new episodes on September 21.

As earlier spoilers have revealed, the fifth volume will be titled "Redemption;" it will feature an odd threesome between Sylar, Nathan and Parkman; and it will focus on an evil circus of individuals with their own abilities.

One of the members of the latter group is featured below, as he and Peter go at it in a cool-looking knife fight:

[video url="http://www.tvfanatic.com/videos/season-four-sneak-peek/" title="Season Four Sneak Peek "] [/video]

Head over to our Heroes forum and dish on the upcoming season now!

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