user: Question: how many maximum series number have 2APX05 prod. code.
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [14.0, 1.0, '"Love Blurts"', 'Michael Fresco', 'Jon Hoberg & Kat Likkel', 'December8,2009', '2APX06']
SQL:

assistant: SELECT COUNT("Series #") FROM "Table" WHERE "Prod. code" = '2APX05';