Question: what is the No in series when Rob Wright & Debra J. Fisher & Erica Messer were the writers?
SQL: SELECT MIN("No. in series") FROM "1-21313327-1" WHERE "Written by" = 'Rob Wright & Debra J. Fisher & Erica Messer';

Question: what was the name of the episode that got 3.3 (millions) of u.s viewers?
SQL: SELECT "Title" FROM "1-21313327-1" WHERE "U.S. viewers (millions)" = '3.3';

Question: who were the directors of the episode called "Someone to Witch Over Me"?
SQL: SELECT "Directed by" FROM "1-21313327-1" WHERE "Title" = '"Someone to Witch Over Me"';

Question: In season number 3,  who were the writers?
SQL: SELECT "Written by" FROM "1-21313327-1" WHERE "No. in season" = 3.0;

Question: when the writer is Brad Kern, how many u.s viewers (in millions) had the episode?
SQL: SELECT "U.S. viewers (millions)" FROM "1-21313327-1" WHERE "Written by" = 'Brad Kern';