CREATE TABLE table_27034 ("\\u2116" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

What date did the episode with 8.61 million U.S. viewers originally air?
SELECT "Original air date" FROM table_27034 WHERE "U.S. viewers (million)" = '8.61'
SELECT "Original air date" FROM "table_27034" WHERE "U.S. viewers (million)" = '8.61'