Table: charlies_angels_tv_ratings
Columns: season
premiere
finale
rank
rating

Question: What is the rank for the episode that premiered on September 12, 1979?
SQL: SELECT "rank" FROM charlies_angels_tv_ratings WHERE "premiere" = 'september 12, 1979'

Question: What was the date of the finale for the season that premiered on September 22, 1976?
SQL: SELECT "finale" FROM charlies_angels_tv_ratings WHERE "premiere" = 'september 22, 1976'

Question: What is the rank for the episode that premiered on September 13, 1978?
SQL: SELECT "rank" FROM charlies_angels_tv_ratings WHERE "premiere" = 'september 13, 1978'

Question: What was the date of the finale for Season 3?
SQL: SELECT "finale" FROM charlies_angels_tv_ratings WHERE "season" = 3

Question: What was the date of the premiere that had a 20.9 rating?
SQL: SELECT "premiere" FROM charlies_angels_tv_ratings WHERE "rating" = '20.9'