user: Question: What is the production code for the number 5 series ? 
Columns: ['No. in series', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '" Pilot "', 'Greg Yaitanes', 'Hart Hanson', 'September13,2005', '1AKY79', '10.79']
SQL:

assistant: SELECT "Production code" FROM "Table" WHERE "No. in series" = 5.0;