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_24910733_2 (share VARCHAR, air_date VARCHAR)

### Question ###
How many share figures are there for the episode that aired on October 17, 2007?

### Accurate SQL ###

SELECT COUNT(share) FROM table_24910733_2 WHERE air_date = "October 17, 2007"