user: Question: Who directed the episode with UK viewership of 6.09 million?
Columns: ['No. overall', 'No. for series', 'Title', 'Directed by', 'Written by', 'Original air date', 'UK viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [14.0, 1.0, '"The Curse of Cornelius Sigan"', 'David Moore', 'Julian Jones', '19September2009', '5.77']
SQL:

assistant: SELECT "Directed by" FROM "Table" WHERE "UK viewers (million)" = '6.09';