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_23117208_3 (viewers__millions_ VARCHAR, prod_code VARCHAR)

### Question ###
how many millions of spectator did has the episode whose prod.code was rp#213?

### Accurate SQL ###

SELECT viewers__millions_ FROM table_23117208_3 WHERE prod_code = "RP#213"