Table: game_cube_show
Columns: series
start_date
end_date
episodes
average_viewers_millions

Question: When did series 6 start?
SQL: SELECT "start_date" FROM game_cube_show WHERE "series" = 6

Question: What series had an average of 3.72 million people watching it?
SQL: SELECT MAX("series") FROM game_cube_show WHERE "average_viewers_millions" = '3.72'

Question: How many different end dates are there for the series seen by 4.2 million people?
SQL: SELECT COUNT("end_date") FROM game_cube_show WHERE "average_viewers_millions" = '4.2'