user: Question: What was the air date of the episod that had 456.58 thousand viewers?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'N.Z. viewers (thousand)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [90.0, 1.0, '"What a Rash and Bloody Deed Is This"', 'Britta Johnstone', 'Rachel Lang', '13July2010', '711.57']
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "N.Z. viewers (thousand)" = '456.58';