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_name_94 ( viewers__millions_ VARCHAR, airdate VARCHAR, channel_4_weekly_rank_a VARCHAR )

### 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_name_94 WHERE airdate = "october 10, 2008" AND channel_4_weekly_rank_a < 30