CREATE TABLE table_25528 ("Episode #" FLOAT, "Prod #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Originalairdate" TEXT)

How many product # have episode 1?
SELECT MAX("Prod #") FROM table_25528 WHERE "Episode #" = '1'
SELECT MAX("Prod #") FROM "table_25528" WHERE "Episode #" = '1'