user: Question: the first episode in this season had what number in the series? 
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [158.0, 1.0, '"Thrill"', 'Martha Mitchell', 'René Balcer', 'September24,1997']
SQL:

assistant: SELECT "No. in series" FROM "Table";