user: Question: What is the original airdate of episode #31?
Columns: ['Episode #', 'Series #', 'Episode Title', 'Original air date', 'Production Code']
Types: ['real', 'real', 'text', 'text', 'real']
Sample row: [27.0, 1.0, '"Return to Genesis"', '5April2008', 201.0]
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "Episode #" = 31.0;