user: Question: What's the series number of the episode seen by 2.43 million viewers in the UK?
Columns: ['Series No.', 'Season No.', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.K. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [13.0, 1.0, '"The Fashion Show"', 'Ben Palmer', 'Damon Beesley & Iain Morris', '13September2010', '2.25']
SQL:

assistant: SELECT "Series No." FROM "Table" WHERE "U.K. viewers (million)" = '2.43';