user: Question: Who directed the episode that had a production code of 2J5457?
Columns: ['No.', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '"Pilot"', 'J. J. Abrams', 'J. J. Abrams & Josh Reims', 'September22,2010', '296768', '8.57']
SQL:

assistant: SELECT "Directed by" FROM "Table" WHERE "Production code" = '2J5457';