Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_70275 ( "Episode #" real, "Title" text, "Airdate" text, "Viewers (millions)" real, "Channel 4 weekly rank a" real )

### Question ###
What is the number of viewers in millions for the episode on October 10, 2008, and a Channel 4 weekly rank a smaller than 30?

### Accurate SQL ###

SELECT COUNT("Viewers (millions)") FROM table_70275 WHERE "Airdate" = 'october 10, 2008' AND "Channel 4 weekly rank a" < '30'