On September 21, Heroes kicks off its fourth season with a two-hour episode.

During the installment, Claire will start college; Nathan will deal with life as a quasi version of Sylar; and a new band of villains will be introduced, led by former Prison Break star Robert Knepper.

Below is a shot of Knepper in the evil, mysterious role of Samuel Sullivan; followed by a number of images from the "Redemption" volume premiere. Click on each to enlarge...

Excited for the new season? Talk to fellow fans about it in our Heroes forum!

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