In an article titled  "Chuck Flashback! We Spy 28 Fun Guest Stars" , TV Line has listed 28 memorable guest stars from Chuck  ; Summer Glau made the list for her guest appearance as a Greta in episode 8 of season 4 "Chuck Versus the Fear of Death".

 

Summer Glau as "Greta"

Of all the Gretas that passed through the Buy More after the CIA covertly co-opted the store, Glau's was our favorite -- one, due to her hair-trigger ferocity, and two, because of the veiled dialogue nod to her and Adam Baldwin's previous gig together, Firefly.

 

Chuck is on SciFiNow Covers.

SciFiNow is a science fiction, horror, cult TV and fantasy UK magazine. Inside the issue #56 of the magazine, on stands on July 2011,  Chuck gets a four-page article for its incredible and so far successfull struggle to survive in a non-scifi-friendly tv universe. The covers says : "How tv's hottest geeks beat the network and the secrets to season five".