CREATE TABLE table_21986 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original U.S. air date" TEXT, "Prod. code" TEXT, "Viewers  ( millions ) " TEXT)

what is the series # for the episode directed by Kelly Sandefur?
SELECT MAX("No. in series") FROM table_21986 WHERE "Directed by" = 'Kelly Sandefur'
SELECT MAX("No. in series") FROM "table_21986" WHERE "Directed by" = 'Kelly Sandefur'