user: Question: when 68 is the episode number what is the series number?
Columns: ['Episode #', 'Series #', 'Episode Title', 'Original air date', 'Production Code']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [53.0, 1.0, '"Stars in Danger"', '5July2010', 301.0]
SQL:

assistant: SELECT "Series #" FROM "Table" WHERE "Episode #" = 68.0;