Season three of Castle left viewers with a number of questions, high atop the list: Who will play the new Captain?

Before this beloved series premieres season four, though, fans can relive the action from 2010-2011. The third season of Castle will be released on DVD on September 20 and include:

• Commentaries on episodes "A Deadly Affair" and "3XK."
• A Round table discussion with Nathan Fillion, best-selling author Michael Connelly and other well known mystery genre personalities.
• Behind the scenes of the Los Angeles-based episode "To Love and Die."
• A gag reel.
• Deleted scenes.

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