CREATE TABLE table_18008 ("No." FLOAT, "#" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT, "U.S. viewers  ( million ) " TEXT)

How many U.S. viewers (million) are there for the episode whose Production code is 3T7051?
SELECT "U.S. viewers (million)" FROM table_18008 WHERE "Production code" = '3T7051'
SELECT "U.S. viewers (million)" FROM "table_18008" WHERE "Production code" = '3T7051'