user: Question: What is the name of the episode that had 8.51 million viewers?
Columns: ['Episode #', 'Series #', 'Title', 'Director', 'Writer', 'Original airdate', 'Viewers (in millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [26.0, 1.0, '" The Deep End "', 'Julie Edwards Category:Articles with hCards', 'Peter Jukes Category:Articles with hCards', '5 Cannot handle non-empty timestamp argument! 2000', '7.79']
SQL:

assistant: SELECT "Title" FROM "Table" WHERE "Viewers (in millions)" = '8.51';