What is the original air date for the episode directed by kevin dowling?
CREATE TABLE "table1_2602958_3" (
  "no" real,
  "num" real,
  "title" text,
  "director" text,
  "writer_s" text,
  "original_air_date" text,
  "prod_code" real,
  "u_s_viewers_million" text
);
SELECT "original_air_date" FROM "table1_2602958_3" WHERE "director"='Kevin Dowling';