CREATE TABLE table_1889 ("No. in series" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

Name who directed the episode that was viewed by 4.22 million
SELECT "Directed by" FROM table_1889 WHERE "U.S. viewers (million)" = '4.22'
SELECT "Directed by" FROM "table_1889" WHERE "U.S. viewers (million)" = '4.22'