CREATE TABLE "table1_21550870_1" (
  "no" real,
  "num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "u_s_viewers_million" text,
  "original_air_date" text,
  "production_code" real
);

Question: Name the original air date for 9.16 viewers
SQL: SELECT "original_air_date" FROM "table1_21550870_1" WHERE "u_s_viewers_million"='9.16';

Question: Name the total number of production code for  episode by steve cohen & andrew dettman
SQL: SELECT COUNT("production_code") FROM "table1_21550870_1" WHERE "written_by"='Steve Cohen & Andrew Dettman';