user: Question: What is the series number for Season #18?
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [92.0, 1.0, '"Day For Knight"', 'Christopher Chulack', 'Lydia Woodward', 'September24,1998']
SQL:

assistant: SELECT "Series #" FROM "Table" WHERE "Season #" = 18.0;