Table schema:
CREATE TABLE table_26261072_1 (series__number INTEGER, written_by VARCHAR, directed_by VARCHAR)

Question: Name the least series number written by brenda hampton and directed by  burt brinckerhoff
SQL: SELECT MIN(series__number) FROM table_26261072_1 WHERE written_by = "Brenda Hampton" AND directed_by = "Burt Brinckerhoff"