CREATE TABLE table_25512 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB)

How many people wrote episode 68 in the series?
SELECT COUNT("Written by") FROM table_25512 WHERE "No. in series" = '68'
SELECT COUNT("Written by") FROM "table_25512" WHERE "No. in series" = '68'