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_16072430_1 ( _number VARCHAR, weekly_rank VARCHAR, timeslot VARCHAR )

### Question ###
How many episodes have a weekly rank tba and are broadcast at 8:00 p.m.?

### Accurate SQL ###

SELECT COUNT(_number) FROM table_16072430_1 WHERE weekly_rank = "TBA" AND timeslot = "8:00 P.M."