CREATE TABLE table_25669 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Prod. code" TEXT, "Viewers  ( millions ) " TEXT)

Name the least number in season for jessica ball
SELECT MIN("No. in season") FROM table_25669 WHERE "Written by" = 'Jessica Ball'
SELECT MIN("No. in season") FROM "table_25669" WHERE "Written by" = 'Jessica Ball'