When was the episode titled "The Parachute of Healing" originally aired?
CREATE TABLE "table1_19632728_1" (
  "season_num" real,
  "episode_num" real,
  "title" text,
  "director_s" text,
  "writer_s" text,
  "original_air_date" text
);
SELECT "original_air_date" FROM "table1_19632728_1" WHERE "title"='\"The Parachute of Healing\"';