CREATE TABLE "table1_28967275_3" (
  "episode_num" real,
  "series_num" real,
  "episode_title" text,
  "original_air_date" text,
  "production_code" real
);

Question: When "the secret of deep stadium" is the episode title what is the lowest series number?
SQL: SELECT MIN("series_num") FROM "table1_28967275_3" WHERE "episode_title"='\"The Secret of Deep Stadium\"';

Question: when 68 is the episode number what is the series number?
SQL: SELECT "series_num" FROM "table1_28967275_3" WHERE "episode_num"=68;

Question: when 69 is the episode number what is the air date?
SQL: SELECT "original_air_date" FROM "table1_28967275_3" WHERE "episode_num"=69;