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_29574579_1 (episode VARCHAR, uk_viewers__million_ VARCHAR)

### Question ###
How many episodes hve 4.50 million viewers?

### Accurate SQL ###

SELECT episode FROM table_29574579_1 WHERE uk_viewers__million_ = "4.50"