CREATE TABLE "table1_23937219_2" (
  "series_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "prod_code" real
);

Question: Name the original air date for harry hannigan directed by adam weissman
SQL: SELECT "original_air_date" FROM "table1_23937219_2" WHERE "written_by"='Harry Hannigan' AND "directed_by"='Adam Weissman';