Table: captain_ratings
Columns: episode
air_date
timeslot
households_rating_share
18_49_rating_share
viewers_m
weekly_rank

Question: Tell me the episode with an 18-49 rating of 2.0/5
SQL: SELECT "episode" FROM captain_ratings WHERE "18_49_rating_share" = '2.0/5'

Question: Name the episode for viewers bigger than 5.63 and the households rating is 4.5/7
SQL: SELECT "episode" FROM captain_ratings WHERE "viewers_m" > 5.63 AND "households_rating_share" = '4.5/7'

Question: Name the 18-49 rating for weekly rank of 30
SQL: SELECT "18_49_rating_share" FROM captain_ratings WHERE "weekly_rank" = '30'