CREATE TABLE "table1_21312845_1" (
  "no_in_series" real,
  "no_in_season" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real,
  "u_s_viewers_millions" text
);

Question: What is the latest episode in the season directed by Chris Long?
SQL: SELECT MAX("no_in_season") FROM "table1_21312845_1" WHERE "directed_by"='Chris Long';

Question: Who wrote the episodes directed by David Straiton?
SQL: SELECT "written_by" FROM "table1_21312845_1" WHERE "directed_by"='David Straiton';

Question: Who directed the episode with a production code greater than 4301103.585233785 that was written by Curtis Kheel?
SQL: SELECT "directed_by" FROM "table1_21312845_1" WHERE "production_code">4301103.585233785 AND "written_by"='Curtis Kheel';