CREATE TABLE table_25524 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB)

what is the name of the episode whose number of the series episode was 31?
SELECT "Title" FROM table_25524 WHERE "No. in series" = '31'
SELECT "Title" FROM "table_25524" WHERE "No. in series" = '31'