Two familiar faces from season 3 are back on "Chuck" 's radar. Stone Cold Steve Austin and Nicole Richie  are odd pair which cancel the romantic mission of Chuck and Sarah in episode "Chuck vs. the Cubic Z". Richie's Heather becomes Chuck's object of interest for he suspects that she knows something about his mom.

"It was great," Yvonne Strahovski said in an interview with Zap2It about Richie's entrance in the episode. "I love Nicole - she's a lot of fun as well. We get to have another fight scene, and she's even more of a badass than she was last time. I know she was doing some kickboxing between the last time she was on the show and now. She did really well - she's really great in those fight scenes."

Also in the October 4 episode, as Morgan prepares the Buy More for a huge video game release, he gets a surprise from Big Mike. Taking the turn to play master of disguise Greta this week is Stacy Keibler.

On another news, former "Daily Show" correspondent Rob Riggle has been tapped to play Jim Rye, "a super smart, intensely positive, and slightly crazy CIA agent who's brought in to help Chuck become an even better spy." EW said his episode is the eighth this season which also features Summer Glau as Greta.