Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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.
### Answer:
SELECT directed_and_produced_by FROM table_24725951_1 WHERE celebrities = "Nick Hewer and Saira Khan"