CREATE TABLE table_17901155_3 (no_in_series INT, directed_by VARCHAR)

what is the series # for the episode directed by Kelly Sandefur?
SELECT MAX(no_in_series) FROM table_17901155_3 WHERE directed_by = "Kelly Sandefur"
SELECT MAX("no_in_series") FROM "table_17901155_3" WHERE "Kelly Sandefur" = "directed_by"