user: Question: When 137 is the number in series what is the production code?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real']
Sample row: [118.0, 1.0, '"Crazy Love"', 'Joel Zwick', 'Brian Bird & John Wierick', 'March 7, 1997', 465352.0]
SQL:

assistant: SELECT "Production code" FROM "Table" WHERE "No. in series" = 137.0;