CREATE TABLE "table1_2623498_4" (
  "episode_num" text,
  "season_episode_num" text,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "prod_code" text
);

Question: Which episodes in season 3 were written by Mark Drop?
SQL: SELECT "season_episode_num" FROM "table1_2623498_4" WHERE "written_by"='Mark Drop';

Question: How many directors were there for season 3 episode 1?
SQL: SELECT COUNT("directed_by") FROM "table1_2623498_4" WHERE "season_episode_num"='1';

Question: How many times did the episode "team impossible" originally air?
SQL: SELECT COUNT("original_air_date") FROM "table1_2623498_4" WHERE "title"='\"Team Impossible\"';