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_228973_5 (no_in_series INTEGER, original_air_date VARCHAR)

### Question ###
What episode number in the series originally aired on April 27, 1999?

### Accurate SQL ###

SELECT MAX(no_in_series) FROM table_228973_5 WHERE original_air_date = "April 27, 1999"