CREATE TABLE table_25668962_1 (us_viewers__million_ VARCHAR, production_code VARCHAR)

How many million U.S. viewers watched the episode with a production code of 1arc03?
SELECT us_viewers__million_ FROM table_25668962_1 WHERE production_code = "1ARC03"
SELECT "us_viewers__million_" FROM "table_25668962_1" WHERE "1ARC03" = "production_code"