user: Question: Who directed the episode with production code 4AKJ01?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [58.0, 1.0, '" Scylla "', 'Kevin Hooks', 'Matt Olmstead', 'September1,2008', '4AKJ01', '6.53']
SQL:

assistant: SELECT "Directed by" FROM "Table" WHERE "Production code" = '4AKJ01';