user: Question: For the episode directed by Matthew Penn, what is the total number in the series?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [47.0, 1.0, '"After the Fireworks"', 'Emile Levisetti', 'Andrew Lenchewski', 'June6,2012', 'RP#401', '3.95']
SQL:

assistant: SELECT SUM("No. in series") FROM "Table" WHERE "Directed by" = 'Matthew Penn';