Table: supernatural_tv_ratings
Columns: season
network
timeslot
season_premiere
season_finale
tv_season
rank_rank_denotes_the_relative_position_of_the_television_series_with_respect_to_other_prime_time_shows_on_the_cw_fox_nbc_cbs_and_abc
viewers_in_millions
rating_rating_is_the_percentage_of_all_households_tuned_into_the_program

Question: What network garnered 2.74 million viewers for Supernatural?
SQL: SELECT "network" FROM supernatural_tv_ratings WHERE "viewers_in_millions" = '2.74'

Question: What season had 2.52 million viewers?
SQL: SELECT "tv_season" FROM supernatural_tv_ratings WHERE "viewers_in_millions" = '2.52'