user: Question: When 15 is the number in season what is the highest number in series?
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 MAX("No. in series") FROM "Table" WHERE "No. in season" = 15.0;