CREATE TABLE table_17138 ("No. in series" FLOAT, "No. in season" FLOAT, "Title" CLOB, "Directed by" CLOB, "Written by" CLOB, "Original air date" CLOB, "Production code" CLOB, "U.S. viewers  ( millions ) " CLOB)

Who directed the show that was viewed by 2.06 million U.S. people?
SELECT "Directed by" FROM table_17138 WHERE "U.S. viewers (millions)" = '2.06'
SELECT "Directed by" FROM "table_17138" WHERE "U.S. viewers (millions)" = '2.06'