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_24725951_1 ( directed_and_produced_by VARCHAR, celebrities VARCHAR )

### Question ###
List the director and producer when Nick Hewer and Saira Khan were starring.

### Accurate SQL ###

SELECT directed_and_produced_by FROM table_24725951_1 WHERE celebrities = "Nick Hewer and Saira Khan"