Table schema:
CREATE TABLE table_28037619_2 (us_viewers__million_ VARCHAR, directed_by VARCHAR, written_by VARCHAR)

Question: How many million u.s. viewers saw the episode that was directed by roger young and written by debra j. fisher?
SQL: SELECT us_viewers__million_ FROM table_28037619_2 WHERE directed_by = "Roger Young" AND written_by = "Debra J. Fisher"