Today is a bittersweet day for loyal 'Chuck' fans, as the show wrapped its final night of filming just a few hours ago. But even though the cameras have stopped rolling, the Buy More lives on -- at least for nine more episodes, the first of which airs tomorrow night (Fri., Dec. 9, 8PM ET on NBC).

AOL TV was on set for the filming of 'Chuck versus the Hack Off,' which was also the final episode of the series that Zachary Levi directed. It guest-stars 'Community' favorite Danny Pudi, 'Lost' alum Eric Lange and ass-kicking 'Matrix' heroine Carrie-Anne Moss, and judging by what we saw during our visit, it promises to be one of the show's most hilarious episodes yet.

We caught up with Moss and Yvonne Strahovski to get the scoop on why Chuck, Sarah and Gertrude find themselves infiltrating a cult; Levi's directing style; and what Strahovski was feeling as the show neared its end. We also have an exclusive -- and revealing -- preview of tomorrow night's episode, so read on for more.

While some shows have lured famous movie stars into leading roles, other shows are taking a more temporary approach this fall with big-name guest stars booked for short-term stints on the small screen.

Fall TV will host several major reunions that you definitely won't want to miss. Terry O'Quinn will head back to the island for a stint alongside former 'Lost' costar Daniel Dae Kim on 'Hawaii Five-0,' while Ray and Debra are back together (sort of) when Ray Romano stops by 'The Middle' to visit his former 'Everybody Loves Raymond' costar Patricia Heaton. And let's not forget 'Buffy the Vampire Slayer' alums Charisma Carpenter and James Marsters playing a married couple on an episode of 'Supernatural' this season.

Wanna know who else is heading to TV this fall? Check out some more of the biggest and best guest stars, including 'The Wire' alum Michael K. Williams (Omar!), Oscar-nominated actress Patricia Clarkson and crooner Josh Groban in AOL TV's fall guest star gallery.