CREATE TABLE "table1_15824796_4" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text
);

Question: Who was "The Magic Necklace" written by?
SQL: SELECT "written_by" FROM "table1_15824796_4" WHERE "title"='\"The Magic Necklace\"';

Question: Which Season originally aired on September 17, 1955
SQL: SELECT "season_num" FROM "table1_15824796_4" WHERE "original_air_date"='September 17, 1955';

Question: What is the lowest number of series?
SQL: SELECT MIN("series_num") FROM "table1_15824796_4";

Question: When did season 9 originally air?
SQL: SELECT "original_air_date" FROM "table1_15824796_4" WHERE "season_num"=9;

Question: Who directed the episode that was written by Jackson Gillis and Originally aired on May 21, 1955?
SQL: SELECT "directed_by" FROM "table1_15824796_4" WHERE "written_by"='Jackson Gillis' AND "original_air_date"='May 21, 1955';