Fall TV 2011 Returning Shows: What to expect

Premieres: Friday, Oct. 21 at 8 p.m.

Expect to see: The show's final season has already lined up some nerd-approved guest stars (Mark Hamill, Carrie-Anne Moss, "Community's" Danny Pudi). Chuck and Sarah (Zachary Levi and Yvonne Strahovski) are now running a private spy outfit -- and, oh yeah, Morgan (Joshua Gomez) has the Intersect in his head.

-- Rick Porter, Zap2it

Related:

'Chuck' co-creator Chris Fedak: 'We kind of know our ending'
'Chuck' enters the matrix with Carrie-Anne Moss