21 August 2010,
Spoilers from Chuck Season 4 Episode 4: "Chuck vs. The Coup D'Etat" below reveal a new guest-star and an away spy mission for the gang.

"Chuck" returns to NBC on September 20 with the episode "Chuck vs. the Anniversary". TV Guide has just disclosed that actress Tia Texada will guest star as Hortencia aka Armand Assante's character's wife. Coming with a secret, she will be introduced when "Chuck and the gang visit the Premier's beautiful island in his native Costa Gravas."