Question: When 3T7458 is the production code who are the writers?
SQL: SELECT "Written by" FROM "1-19068566-1" WHERE "Production code" = '3T7458';

Question: When there are  3.39 million u.s viewers what is the production code?
SQL: SELECT "Production code" FROM "1-19068566-1" WHERE "U.S. viewers (million)" = '3.39';

Question: When 3T7461 is the production code who is the director?
SQL: SELECT "Directed by" FROM "1-19068566-1" WHERE "Production code" = '3T7461';