user: Question: How many different episode numbers are there for episodes directed by Wayne Rose?
Columns: ['No.', '#', 'Title', 'Directed by', 'Written by', 'U.S. air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [175.0, 1.0, '"Savior"', 'Kevin G. Fair', 'Kelly Souders & Brian Peterson', 'September25,2009', '3X5251', '2.58']
SQL:

assistant: SELECT COUNT("#") FROM "Table" WHERE "Directed by" = 'Wayne Rose';