user: Question: Original airdate for #6 with 1.246 viewers?
Columns: ['Episode', 'Original airdate', 'Timeslot (approx.)', 'Viewers (millions)', 'Nightly rank']
Types: ['real', 'text', 'text', 'real', 'text']
Sample row: [1.0, '9 August 2009', 'Sunday 6:30–7:30 pm', 1.339, '#3']
SQL:

assistant: SELECT "Original airdate" FROM "Table" WHERE "Nightly rank" = '#6' AND "Viewers (millions)" = 1.246;