Here are the details of a casting call for episode 21, "Chuck vs. the Wedding Planner":
The wedding planner in question is one Daphne Peralta, a fashionable, fit, smart, sexy woman in her 30s or 40s who sports a New Jersey accent. She's planning a wedding for the daughter of a Hungarian nuclear scientist, Dr. Klug, who happens to work for Iran. His sons, Bruno, Franz & Paulie are also nuclear scientists working for Iran.
via Chuck TV