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TABLE: CREATE TABLE table_33698 ( "Episode Number" real, "Title" text, "Podcast Date" text, "Run time" text, "Historical References" text )

### Question ###
What is the historical reference of the episode that aired on October 23, 2005?

### Accurate SQL ###

SELECT "Historical References" FROM table_33698 WHERE "Podcast Date" = 'october 23, 2005'