CREATE TABLE table_30995 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original Air date" CLOB)

which episode of the season aired on october20,2012
SELECT MAX("No. in season") FROM table_30995 WHERE "Original Air date" = 'October20,2012'
SELECT MAX("No. in season") FROM "table_30995" WHERE "Original Air date" = 'October20,2012'