user: Question: What season had 2.52 million viewers?
Columns: ['Season', 'Network', 'Timeslot', 'Season premiere', 'Season finale', 'TV season', 'Rank Rank denotes the relative position of the television series with respect to other prime time shows on the CW, FOX, NBC, CBS, and ABC.', 'Viewers in millions', 'Rating Rating is the percentage of all households tuned into the program.']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'The WB', 'Tuesday 9/8c', 'September 13, 2005', 'May 4, 2006', '2005–2006', '#165', '3.81', '1.4']
SQL:

assistant: SELECT "TV season" FROM "Table" WHERE "Viewers in millions" = '2.52';