user: Question: Which episode has been viewed 6.34 million times? 
Columns: ['#', 'Episode', 'Writer', 'Director', 'Original air date', 'Viewing figure']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [11.0, '"Episode 1"(75-minute Christmas special)', 'Bill Gallagher', 'Alan Grint', '21December2008', '6.58 million']
SQL:

assistant: SELECT "Episode" FROM "Table" WHERE "Viewing figure" = '6.34 million';