user: Question: What is the total number of patient portayers for the episode directed by Craig Zisk and written by Brad Falchuk?
Columns: ['No.', '#', 'Title', 'Directed by', 'Written by', 'Patient Portrayer', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [30.0, 1.0, '"Momma Boone"', 'Elodie Keene', 'Ryan Murphy', 'Kathy Lamkin', 'September20,2005', '2T5951']
SQL:

assistant: SELECT COUNT("Patient Portrayer") FROM "Table" WHERE "Directed by" = 'Craig Zisk' AND "Written by" = 'Brad Falchuk';