Who was the director for the episode on May 2, 1959?
CREATE TABLE "season_4_1958_59" (
  "series_num" real,
  "season_num" real,
  "title" text,
  "director" text,
  "writer_s" text,
  "airdate" text
);
SELECT "director" FROM "season_4_1958_59" WHERE "airdate"='May 2, 1959';