user: Question: Who directed the episode where u.s. viewers (million) is 12.90?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Featured character(s)', 'Original air date', 'U.S. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [73.0, 1.0, '" The Beginning of the End "', 'Jack Bender', 'Damon Lindelof & Carlton Cuse', 'Hurley', 'January31,2008', '16.07']
SQL:

assistant: SELECT "Directed by" FROM "Table" WHERE "U.S. viewers (million)" = '12.90';