CREATE TABLE "table1_29747178_2" (
  "series_num" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" text,
  "u_s_viewers_million" text
);

Question: Who is the writer when the director is bob berlinger?
SQL: SELECT "written_by" FROM "table1_29747178_2" WHERE "directed_by"='Bob Berlinger';

Question: How many millions of U.S viewers are there when the director is andy wolk?
SQL: SELECT "u_s_viewers_million" FROM "table1_29747178_2" WHERE "directed_by"='Andy Wolk';

Question: What is the series # when the director is john showalter?
SQL: SELECT "series_num" FROM "table1_29747178_2" WHERE "directed_by"='John Showalter';

Question: Who is the director when the title is "believers"?
SQL: SELECT "directed_by" FROM "table1_29747178_2" WHERE "title"='\"Believers\"';

Question: What is the title when the series # is 7?
SQL: SELECT "title" FROM "table1_29747178_2" WHERE "series_num"=7;