CREATE TABLE "table1_17355743_1" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);

Question: Who wrote season 10
SQL: SELECT "written_by" FROM "table1_17355743_1" WHERE "season_num"=10;

Question: Name who directed the episode by joe sachs and david zabel
SQL: SELECT "directed_by" FROM "table1_17355743_1" WHERE "written_by"='Joe Sachs and David Zabel';