Question: how many series had 6.55 u.s. viewers (million) and were directed by Pete Michels
SQL: SELECT COUNT("No. in series") FROM "1-26259391-1" WHERE "U.S. viewers (million)" = '6.55' AND "Directed by" = 'Pete Michels';

Question: how many series have production code 8ACX05
SQL: SELECT "No. in series" FROM "1-26259391-1" WHERE "Production code" = '8ACX05';

Question: how many u.s. viewers (million) have seen a production written by Chris Sheridan & Danny Smith
SQL: SELECT COUNT("U.S. viewers (million)") FROM "1-26259391-1" WHERE "Written by" = 'Chris Sheridan & Danny Smith';

Question: which production codes were written by Andrew Goldberg
SQL: SELECT "Production code" FROM "1-26259391-1" WHERE "Written by" = 'Andrew Goldberg';

Question: Which production code had original air dated February20,2011
SQL: SELECT "Production code" FROM "1-26259391-1" WHERE "Original air date" = 'February20,2011';