Table: tv_episode_data_35
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: How many episodes had an audience of exactly 25.3 million viewers in the U.S.A.?
SQL: SELECT COUNT("production_code") FROM tv_episode_data_35 WHERE "u_s_viewers_millions" = '25.3'